.env.example

# Bulwark Webmail - Production Configuration
# Copy this file to .env.local and fill in your values.
# For development with the built-in mock server, see .env.dev.example instead.

# =============================================================================
# JMAP Server (required)
# =============================================================================

# App name displayed in the UI, browser tab title, and PWA manifest.
APP_NAME=Bulwark Webmail

# URL of your JMAP-compatible mail server (required unless ALLOW_CUSTOM_JMAP_ENDPOINT is set)
# The webmail server checks every sign-in against this URL itself, so it must
# resolve and be trusted from here (e.g. inside the container), not only from
# the browser. If the mail server uses a self-signed or private-CA certificate,
# point NODE_EXTRA_CA_CERTS at that certificate or its CA; otherwise calendar
# subscriptions and other server-side features fail with "Not authenticated".
JMAP_SERVER_URL=https://your-jmap-server.com
# NODE_EXTRA_CA_CERTS=/certs/mail-ca.pem

# Allow users to specify a custom JMAP server URL on the login form.
# When enabled, a "JMAP Server" field appears on the login page.
# Users can connect to any JMAP-compatible server.
# NOTE: External JMAP servers must include this domain in their CORS
# Access-Control-Allow-Origin header, or browser requests will be blocked.
# ALLOW_CUSTOM_JMAP_ENDPOINT=true

# Offer several JMAP servers on the login form. JSON array; each entry needs
# id, label, and url. "domains" and a per-server "oauth" block are optional.
# Prefer configuring this from the admin dashboard - the env form exists for
# stateless deployments. An "oauth" block with both "clientId" and
# "buttonLabel" gives that server its own sign-in button on the login page,
# even while OAuth is off globally. "endSessionUrl" in the "oauth" block is
# that server's OAUTH_END_SESSION_URL (see below).
# JMAP_SERVERS=[{"id":"eu","label":"Europe","url":"https://eu.example.com","domains":["example.com"]},{"id":"us","label":"US","url":"https://us.example.com","oauth":{"clientId":"webmail-us"}}]

# Pick the server automatically from the domain of the address the user types,
# matching against each entry's "domains" list. Default: false.
# JMAP_SERVER_AUTO_PICK_BY_DOMAIN=true

# =============================================================================
# Stalwart Mail Server Integration
# =============================================================================

# Enable Stalwart-specific features (password change, sieve filters, etc.)
# Set to "false" to disable if using a non-Stalwart JMAP server.
# STALWART_FEATURES=true

# =============================================================================
# OAuth / OpenID Connect (optional)
# =============================================================================

# Set to "true" to use OAuth instead of basic JMAP authentication
# OAUTH_ENABLED=true

# Set to "true" to only allow OAuth login (hides username/password form)
# Requires OAUTH_ENABLED=true
# OAUTH_ONLY=true

# OAuth client ID registered with your identity provider
# OAUTH_CLIENT_ID=your-client-id

# OAuth client secret (server-side only, never exposed to the browser)
# OAUTH_CLIENT_SECRET=your-client-secret
# Alternatively, you can specify the path to a file containing the OAuth client secret.
# OAUTH_CLIENT_SECRET_FILE=/oauth-client-secret

# OpenID Connect issuer URL for discovery
# OAUTH_ISSUER_URL=https://your-idp.example.com

# Overrides only the user-facing authorize endpoint (e.g. a per-brand login
# host). Discovery, token exchange and refresh keep using OAUTH_ISSUER_URL.
# Leave unset to use the authorization_endpoint from discovery.
# OAUTH_AUTHORIZE_URL=https://login.your-brand.example.com/application/o/authorize/

# Allow OAuth endpoints on other hosts to resolve to private (RFC-1918 /
# loopback) addresses. Off by default as an SSRF guard. Endpoints on the
# issuer's own host are always allowed, so split-DNS deployments where the
# issuer's public hostname resolves to an internal IP work without this. Enable
# only when the IdP advertises endpoints on a different internal host.
# OAUTH_ALLOW_PRIVATE_ENDPOINTS=true

# Signing out of an SSO account also signs out of the identity provider,
# through the end_session_endpoint it advertises or OAUTH_END_SESSION_URL
# (RP-initiated logout). Set to false when the provider is shared with apps
# that should stay signed in.
# OAUTH_END_SESSION=false

# Signing out revokes Bulwark's refresh token at the provider's revocation
# endpoint. Stalwart 1.0 then also removes Bulwark from the user's connected
# applications and asks for consent again on the next sign-in. Set to false
# to keep the consent; the refresh token then stays valid at the provider
# until it expires.
# OAUTH_REVOKE_ON_SIGN_OUT=false

# The provider's logout URL, for providers whose discovery document has no
# end_session_endpoint (Stalwart's built-in provider, for example). When set,
# it is used instead of the discovered endpoint and gets the same parameters:
# client_id, id_token_hint and post_logout_redirect_uri. Must be https.
# Applies to OAUTH_ISSUER_URL's provider only; JMAP_SERVERS entries set their
# own "endSessionUrl" in their "oauth" block.
# OAUTH_END_SESSION_URL=https://your-idp.example.com/logout

# Where the identity provider sends the browser after signing the user out.
# Register it with the provider as a post-logout redirect URI first, or it
# will refuse the logout. Unset: the provider shows its own signed-out page.
# OAUTH_POST_LOGOUT_REDIRECT_URI=https://mail.example.com/en/login

# Replace the scopes requested at authorization. Space-separated. Leave unset
# to use the defaults: openid email profile. offline_access is not among them;
# add it if your IdP (e.g. Authelia) only issues refresh tokens for it,
# otherwise sessions end when the access token expires.
# OAUTH_SCOPES=openid email profile offline_access

# Append scopes instead of replacing them. Use this when your IdP needs one
# extra scope and you don't want to restate the defaults.
# OAUTH_EXTRA_SCOPES=groups

# Send the user straight to the identity provider, skipping the login form.
# Intended for embedded deployments where the parent app already authenticated
# them. Default: false.
# AUTO_SSO_ENABLED=true

# =============================================================================
# Session & Security
# =============================================================================

# Secret key for encrypting "Remember me" sessions and settings sync data.
# Required for both "Remember me" and settings sync features. Left unset,
# one is generated on first start and kept in the admin state dir
# (data/admin-state), so keep that dir on a persistent volume.
# Generate with: openssl rand -base64 32
# SESSION_SECRET=your-secret-key-here
# Alternatively, you can specify the path to a file containing the session secret.
# SESSION_SECRET_FILE=/session-secret

# =============================================================================
# Settings Sync
# =============================================================================

# Enable server-side settings persistence (requires SESSION_SECRET).
# When enabled, user settings are encrypted and stored on the server,
# allowing them to sync across browsers and devices.
# SETTINGS_SYNC_ENABLED=true

# Directory for storing encrypted settings files (default: ./data/settings).
# For Docker, the working directory is /app, so the default resolves to
# /app/data/settings - mount a persistent volume there (see docker-compose.yml).
# SETTINGS_DATA_DIR=./data/settings

# =============================================================================
# Admin Dashboard Data
# =============================================================================

# Admin data is split across two directories so the config volume can be
# mounted read-only after the setup wizard completes (see issue #226).
#
# Config dir - operator-authored state. Holds config.json, policy.json,
# admin.json (passwordHash only), plugin-config/, plugins/, themes/, and
# branding uploads. Safe to mount read-only after setup.
# Default: ./data/admin (or ADMIN_DATA_DIR if that legacy variable is set)
# ADMIN_CONFIG_DIR=./data/admin
#
# State dir - runtime mutations. Holds admin-state.json (login timestamps),
# audit.log, and the bootstrap setup token. Always read-write.
# Default: ./data/admin-state (or ADMIN_DATA_DIR/state when ADMIN_DATA_DIR
#          is set, for back-compat with single-volume installs)
# ADMIN_STATE_DIR=./data/admin-state
#
# Set to "true" to enforce read-only mode at the application layer (cleaner
# error than a mid-request EROFS). Pair with `:ro` on the config-volume mount.
# ADMIN_CONFIG_READONLY=true
#
# Optional existing PEM PKCS#8 Ed25519 private key used to sign managed plugin
# bundles. Bulwark reads this exact path without modifying it. Use a runtime
# secret mount such as a systemd credential, Docker secret, or Kubernetes Secret.
# When unset, Bulwark loads or creates ADMIN_CONFIG_DIR/plugin-signing.key.
# PLUGIN_SIGNING_KEY_FILE=/run/secrets/plugin-signing-key
#
# Legacy: a single dir containing both config and state. Honoured if neither
# of the split variables is set. New installs should use the split vars.
# ADMIN_DATA_DIR=./data/admin

# =============================================================================
# Anonymous Telemetry
# =============================================================================

# Anonymous instance telemetry is OPT-IN and disabled by default. Enabling it
# helps us understand how Bulwark is used so we can make the product better.
# Heartbeats contain no PII: version, platform, bucketed account counts, and
# feature toggles only - never email addresses, hostnames, or IPs. See
# https://bulwarkmail.org/docs/legal/privacy/telemetry for the full schema.
#
# Enable telemetry (also toggleable in the admin UI):
# BULWARK_TELEMETRY=on
#
# Setting this (on or off) locks the choice and disables the admin UI toggle.

# Directory for telemetry state: instance id, consent, login HMACs
# (default: ./data/telemetry). For Docker, the default resolves to
# /app/data/telemetry - mount a persistent volume there (see docker-compose.yml)
# so the instance id and consent choice survive upgrades.
# TELEMETRY_DATA_DIR=./data/telemetry

# Legacy kill switch, honoured only when BULWARK_TELEMETRY is unset.
# BULWARK_TELEMETRY_DISABLED=1

# Let heartbeats reach a private/loopback address. Off by default as an SSRF
# guard; only useful when running a collector locally during development.
# BULWARK_TELEMETRY_ALLOW_PRIVATE=1

# Stalwart version to report in heartbeats. Stalwart does not publish its
# version, so the heartbeat leaves it empty unless it is set here.
# STALWART_VERSION=0.16.23

# =============================================================================
# Server Listen Address
# =============================================================================

# Hostname the server binds to (default: 0.0.0.0)
# Set to "::" for dual-stack
# HOSTNAME=0.0.0.0

# Port the server listens on (default: 3000)
# PORT=3000

# =============================================================================
# Logging
# =============================================================================

# Log format: "text" (colored, human-readable) or "json" (structured, for log aggregation)
# LOG_FORMAT=text

# Log level: "error", "warn", "info", or "debug"
# LOG_LEVEL=info

# =============================================================================
# Branding (all optional)
# =============================================================================

# ---------------------------------------------------------------------------
# App identity
# ---------------------------------------------------------------------------

# Short name for the app, used in contexts where space is limited
# (e.g. home screen label on mobile). Defaults to APP_NAME if not set.
# APP_SHORT_NAME=Bulwark

# Description shown in the PWA manifest (displayed by the OS during install).
# Defaults to a generic Bulwark description if not set.
# APP_DESCRIPTION=Your personal webmail

# ---------------------------------------------------------------------------
# Icons & favicon
# ---------------------------------------------------------------------------

# Custom favicon shown in the browser tab.
# Supported formats: SVG (recommended), PNG, ICO.
# Can be an absolute URL (https://...) or a path relative to the public/ directory.
# Defaults to the Bulwark favicon if not set.
# FAVICON_URL=/branding/my-favicon.svg

# Source image used to auto-generate PWA icons (192×192 and 512×512 PNG).
# Supported formats: SVG (recommended for best quality) or PNG (≥512×512px recommended).
# Can be an absolute URL (https://...) or a path relative to the public/ directory.
# Falls back to FAVICON_URL if not set, and to the default Bulwark icons if neither is set.
# PWA_ICON_URL=/branding/my-icon.svg

# ---------------------------------------------------------------------------
# PWA appearance
# ---------------------------------------------------------------------------

# Color applied to the browser UI chrome when the app is installed as a PWA
# (address bar, status bar on Android). Default: #ffffff
# PWA_THEME_COLOR=#3b82f6

# Background color shown on the PWA splash screen while the app is loading.
# Should match your app's main background color. Default: #ffffff
# PWA_BACKGROUND_COLOR=#ffffff

# Screenshots shown in the browser's install prompt. Absolute URLs or paths
# relative to public/. Both are optional; per-domain overrides are available
# through DOMAIN_BRANDING.
# PWA_SCREENSHOT_MOBILE_URL=/branding/screenshot-mobile.png
# PWA_SCREENSHOT_DESKTOP_URL=/branding/screenshot-desktop.png

# ---------------------------------------------------------------------------
# Logos
# ---------------------------------------------------------------------------

# Logos shown in the sidebar (main app, after login).
# Supported formats: SVG (recommended), PNG, WebP.
# Recommended size: min 24×24px, max 128×128px.
# Can be absolute URLs or paths relative to the public/ directory.
# If not set, no logo is shown in the sidebar.
# APP_LOGO_LIGHT_URL=/branding/my-logo-color.svg
# APP_LOGO_DARK_URL=/branding/my-logo-white.svg

# Logos shown on the login page.
# Supported formats: SVG (recommended), PNG, WebP.
# Recommended size: min 32×32px, max 512×512px.
# Can be absolute URLs or paths relative to the public/ directory.
# Light mode logo (shown on light backgrounds). Defaults to the Bulwark logo.
LOGIN_LOGO_LIGHT_URL=/branding/Bulwark_Logo_Color.svg
# Dark mode logo (shown on dark backgrounds). Defaults to the Bulwark white logo.
LOGIN_LOGO_DARK_URL=/branding/Bulwark_Logo_Color.svg

# ---------------------------------------------------------------------------
# Login page
# ---------------------------------------------------------------------------

# Company name shown above the version number on the login page.
LOGIN_COMPANY_NAME=Bulwark Webmail

# URL for the imprint / legal notice link on the login page.
# LOGIN_IMPRINT_URL=https://example.com/imprint

# URL for the privacy policy link on the login page.
# LOGIN_PRIVACY_POLICY_URL=https://example.com/privacy

# URL for the company website link on the login page.
LOGIN_WEBSITE_URL=https://bulwarkmail.org

# Placeholder of the email field on the login page, for example your own
# address format. It replaces the translated example in every language.
# Unset uses the translation.
# LOGIN_USERNAME_PLACEHOLDER=user@company.example

# Where users get the source code of this build, linked from Settings >
# About. Bulwark is AGPL-3.0-only: if you run a modified build, set this to
# the source of exactly what you deploy (your fork, at the deployed commit).
# Unset links to the upstream repository. Only http(s) URLs are used.
# SOURCE_CODE_URL=https://git.example.com/acme/webmail/tree/v1.2.3

# Accessibility and help links. Each one shows on the login page, in the
# settings sidebar and in the account menu, in the same place on every
# page (WCAG 3.2.6). Unset hides it. Public bodies in Germany need the
# statement and a way to report barriers on every page (BITV 2.0 §7).
# Only http(s) URLs are used; the feedback link may also be an email address.
# ACCESSIBILITY_STATEMENT_URL=https://example.com/accessibility
# ACCESSIBILITY_FEEDBACK_URL=barriers@example.com
# HELP_URL=https://example.com/help/webmail
# EASY_READ_URL=https://example.com/leichte-sprache
# SIGN_LANGUAGE_URL=https://example.com/gebaerdensprache

# Cap the login logo's rendered size. Any CSS length ("120px", "8rem").
# Unset means the logo renders at its natural size.
# LOGIN_LOGO_MAX_HEIGHT=96px
# LOGIN_LOGO_MAX_WIDTH=320px

# Hide parts of the login page. All default to true.
# Turn the heading and subtitle off when the logo already reads as the brand.
# LOGIN_SHOW_HEADING=false
# LOGIN_SHOW_SUBTITLE=false
#
# Hide the optional TOTP field. A server that requires TOTP (totp_required)
# still shows it regardless of this setting.
# LOGIN_SHOW_TOTP=false
#
# Offer "Sign in with an access token" (default false). For JMAP servers
# that authenticate API tokens as Bearer tokens instead of passwords, such
# as Fastmail (JMAP_SERVER_URL=https://api.fastmail.com).
# LOGIN_SHOW_TOKEN_LOGIN=true
#
# Show the "Remember me" box (default false). Without it every sign-in is
# remembered, provided SESSION_SECRET is set. The box also decides for SSO
# sign-ins, on the SSO-only page (OAUTH_ONLY) too; AUTO_SSO_ENABLED signs in
# with it unticked, so that session ends with the browser.
# LOGIN_SHOW_REMEMBER_ME=true
#
# Hide the version number, so it isn't disclosed to unauthenticated visitors.
# LOGIN_SHOW_VERSION=false

# ---------------------------------------------------------------------------
# Per-domain branding overrides (optional)
# ---------------------------------------------------------------------------
#
# When you serve the webmail on multiple hostnames, each hostname can override
# a subset of branding fields. Unset fields fall back to the global values
# above. Match is on the request's Host (or X-Forwarded-Host) header.
#
# Use the leftmost label "*." to match any subdomain (e.g. "*.example.com"
# matches mail.example.com and any deeper subdomain, but NOT example.com).
# Exact matches always win over wildcards; the longest wildcard suffix wins
# among multiple wildcard matches.
#
# Overridable keys: appName, appShortName, appDescription, faviconUrl,
# pwaIconUrl, pwaThemeColor, pwaBackgroundColor, appLogoLightUrl,
# appLogoDarkUrl, loginLogoLightUrl, loginLogoDarkUrl, loginCompanyName,
# loginImprintUrl, loginPrivacyPolicyUrl, loginWebsiteUrl, loginUsernamePlaceholder,
# accessibilityStatementUrl, accessibilityFeedbackUrl, helpUrl, easyReadUrl,
# signLanguageUrl.
#
# Prefer setting this from the admin dashboard (PATCH /api/admin/config).
# The env-var form is provided for stateless deployments.
#
# DOMAIN_BRANDING=[{"host":"maildomain1.com","loginCompanyName":"Company One","loginLogoLightUrl":"/branding/one-color.svg","loginLogoDarkUrl":"/branding/one-white.svg","loginWebsiteUrl":"https://one.example"},{"host":"maildomain2.com","loginCompanyName":"Company Two","faviconUrl":"/branding/two-favicon.svg"},{"host":"*.intranet.example.com","loginCompanyName":"Internal"}]

# =============================================================================
# Extension Directory / Marketplace
# =============================================================================

# URL of the BulwarkMail extension directory for the admin marketplace.
# Defaults to https://extensions.bulwarkmail.org. Override only if you run
# your own directory (e.g. http://localhost:3001 for local development).
# EXTENSION_DIRECTORY_URL=https://extensions.bulwarkmail.org

# =============================================================================
# Admin Dashboard Access
# =============================================================================

# Bootstrap password for the admin dashboard. Read only when admin.json does
# not already exist; the app hashes it, writes admin.json, and logs a warning
# telling you to remove this variable. Without it (and without the setup
# wizard) the admin dashboard stays disabled.
# Accepts a plaintext password or an existing hash.
# ADMIN_PASSWORD=change-me

# Admin session lifetime in seconds. Default: 3600 (1 hour).
# ADMIN_SESSION_TTL=3600

# What a Stalwart admin account grants in the Bulwark admin dashboard.
#   auto     - Stalwart admins see the admin shield and are signed into
#              /admin without the Bulwark admin password. Default.
#   password - Stalwart admins see the shield, but must enter the Bulwark
#              admin password.
#   off      - Stalwart admin status is ignored: no shield, and /admin is
#              reachable only via /admin/login with the admin password.
# "password" and "off" need ADMIN_PASSWORD (or a wizard-set password),
# otherwise the dashboard would have no way in. Also editable in the admin
# dashboard under Authentication.
# STALWART_ADMIN_ACCESS=auto

# How many trusted reverse proxies sit in front of the app. The client IP is
# taken that many entries from the right of X-Forwarded-For, so an attacker
# can't spoof it by prepending values. Default: 1.
# Without any reverse proxy the header is whatever the client sends, so
# per-IP limits and audit-log addresses can be forged; admin sign-in then
# still stops at 50 attempts per 15 minutes across all clients. Put the
# app behind a proxy that appends X-Forwarded-For.
# TRUSTED_PROXY_DEPTH=2

# Allow search engines to index the app (robots.txt / noindex). Default: false.
# SEARCH_ENGINE_INDEXING=true

# =============================================================================
# Cookies, Embedding & Reverse Proxies
# =============================================================================

# SameSite attribute for session cookies: lax (default), strict, or none.
# Embedding the app cross-origin in an iframe requires "none".
# COOKIE_SAME_SITE=none

# Force the Secure flag on cookies. Defaults to on when NODE_ENV=production or
# COOKIE_SAME_SITE=none. Set to false only for local HTTP development.
# COOKIE_SECURE=false

# Which other sites may frame the app, as a CSP frame-ancestors value. By
# default none may. Space-separate multiple origins. 'self' is always added,
# since the app frames its own PDF previews.
# ALLOWED_FRAME_ANCESTORS=https://portal.example.com

# Origin of the parent page when embedded, used for postMessage handshakes.
# NEXT_PUBLIC_PARENT_ORIGIN=https://portal.example.com

# =============================================================================
# Update Check
# =============================================================================

# The app periodically checks for new releases and shows a notice. Set to
# "off" (or false/0/no) to disable the check entirely.
# BULWARK_UPDATE_CHECK=off

# Override the endpoint it checks. Takes priority over the on-disk state file.
# An explicit empty value also disables the check.
# BULWARK_UPDATE_CHECK_URL=https://updates.example.com/bulwark.json

# Where the check stores its state. Default: ./data/version-check
# VERSION_CHECK_DATA_DIR=./data/version-check

# =============================================================================
# Translation Proxy (optional)
# =============================================================================

# /api/translate defaults to the public MyMemory API, which needs no setup.
# Point it at a LibreTranslate instance instead to keep message text on
# infrastructure you control. LibreTranslate also auto-detects the source
# language natively.
# LIBRETRANSLATE_URL=https://libretranslate.example.com
# LIBRETRANSLATE_API_KEY=

# =============================================================================
# Brand Logos (BIMI)
# =============================================================================

# Senders that publish a BIMI record and enforce DMARC get their logo as the
# sender icon, looked up by this server (/api/bimi). By default a logo shows
# when only the DNS record backs it, as Yahoo does. Set to true to show only
# logos backed by a Verified Mark or Common Mark Certificate, as Gmail and
# Apple Mail do. Users turn logos off with the sender icons setting.
# BIMI_REQUIRE_CERTIFICATE=true

# =============================================================================
# Web Push
# =============================================================================

# Push notifications go through a hosted relay so self-hosters don't need
# their own VAPID keys and Firebase project. Point this at your own relay to
# avoid the default. Build-time variable.
# Default: https://notifications.relay.bulwarkmail.org
# NEXT_PUBLIC_PUSH_RELAY_URL=https://push.example.com

# =============================================================================
# Demo Mode
# =============================================================================

# Serve fixture data instead of talking to a mail server. Default: false.
# DEMO_MODE=true

# =============================================================================
# Stalwart Impersonation (advanced)
# =============================================================================

# Lets a trusted platform mint a JWT that logs a user in without their
# password, using a Stalwart master account. Intended for embedded
# deployments where an outer platform already authenticated the user.
#
# SECURITY: this grants sign-in as any mailbox on the server. The endpoint
# returns 404 unless all three required variables below are set, so leaving
# them unset keeps the feature fully off. Treat the secret and the master
# password as you would a root credential.
#
# The master password never leaves the server: each handoff uses it once to
# create an app password on the target mailbox, valid for 8 hours and
# revoked on sign-out. The target account's role therefore needs the
# app-password permissions (Stalwart's default user role has them).
#
# BULWARK_JWT_AUTH_SECRET=            # required, >= 32 characters
# BULWARK_STALWART_MASTER_USER=       # required, e.g. master@example.com
# BULWARK_STALWART_MASTER_PASSWORD=   # required
# BULWARK_JWT_AUTH_ISSUER=            # optional, default "platform-api/webmail"

# =============================================================================
# Internationalization
# =============================================================================
# These are build-time variables - to change them with the published Docker
# image, rebuild it with --build-arg (see README "Default UI locale").
#
# Fallback UI locale used when the visitor's Accept-Language header does not
# match any supported locale. Defaults to "en".
# Supported: ar, ca, cs, da, de, en, es, fa, fr, he, hu, it, ja, ko, lv, nl, pl,
#            pt, ro, ru, sk, tr, uk, zh
# An unsupported value falls back to "en".
# NEXT_PUBLIC_DEFAULT_LOCALE=tr

# Locale prefix mode for URLs. Recommended "always" when proxying under a
# subpath (NEXT_PUBLIC_BASE_PATH) to avoid next-intl rewrite loops.
# Values: never (default) | always | as-needed
# NEXT_PUBLIC_LOCALE_PREFIX=always

# =============================================================================
# Legacy Build-time Variables (still supported as fallback)
# =============================================================================
# These are baked into the bundle at build time. The runtime variables above
# take priority when both are set.
#
# NEXT_PUBLIC_APP_NAME=Bulwark Webmail
# NEXT_PUBLIC_JMAP_SERVER_URL=https://your-jmap-server.com