[Bug]: Nginx WebSocket config snippet produces duplicate location / block

[vanyasem]

Describe the bug

The "Configure WebSocket Support" instructions tell users to create nginx/vhost.d/<host> containing a location / { ... } block. But the generated server config already emits its own location / { ... } block, and the vhost.d file is included at server scope (not inside the existing location). The result is two sibling location / directives in the same server, which nginx rejects:

nginx: [emerg] duplicate location "/" in /etc/nginx/conf.d/default.conf

This pattern comes from nginx-proxy, which exposes two distinct include points per vhost:

vhost.d/<host> — included at server scope
vhost.d/<host>_location — included inside the generated location / block

The directives in the snippet (proxy_set_header Upgrade, proxy_read_timeout, client_max_body_size) only make sense inside a location block, so they need to go in the _location variant — without their own location { ... } wrapper. The docs currently mix the two conventions: _location-style contents written to a server-scope filename, with an extra location / wrapper on top.

Proposed fix

Update the snippet to:

cat > nginx/vhost.d/teldrive.yourdomain.com_location << 'EOL'
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_read_timeout 86400;
client_max_body_size 2000M;
EOL

Two changes: the filename gets the _location suffix, and the wrapping location / { ... } is removed. The directives are then injected into the existing location /, WebSocket upgrades and large uploads work, and no duplicate block is produced.

Reproduction

Follow the WebSocket Support section and create nginx/vhost.d/teldrive.yourdomain.com exactly as documented.
Reload nginx / restart the container.
Inspect the generated server block — as shown in the docs, it contains both include /etc/nginx/vhost.d/teldrive.yourdomain.com; (which injects a location /) and a literal location / { proxy_pass ...; } immediately after.
nginx refuses the config because location / is declared twice in the same server.

Expected behavior

WebSocket directives are merged into the existing location /, nginx reloads cleanly.

Version

1.8.3

Which Platform are you using?

Linux

Additional context

Offending nginx/conf.d/default.conf snippet: