Dockerfile

# build nginx
FROM nginx

RUN rm /etc/nginx/conf.d/default.conf
COPY nginx.conf /etc/nginx/nginx.conf

# build the flask app
FROM python:alpine
ENV PYTHONUNBUFFERED=1

# Install python3 and symlink it to python
RUN apk add --update --no-cache python3 && ln -sf python3 /usr/bin/python

RUN python3 -m ensurepip
RUN pip3 install --no-cache --upgrade pip setuptools

# create and activate virtual env
# using final folder name to avoid path issues with packages

RUN python3 -m venv /home/gil/venve
ENV VIRTUAL_ENV=/home/gil/venve
ENV PATH="/home/gil/venve/bin:$PATH"
RUN source /home/gil/venve/bin/activate

# create user without password
RUN adduser gil -D

# Create a folder app in container and work inside it
WORKDIR /home/gil/app

# Copy all the flask project files into the WORKDIR
COPY requirements.txt .

# install bash
RUN apk add --no-cache bash

# install all the requirements
RUN python3 -m pip install --upgrade pip
RUN pip3 install -r requirements.txt

# copies all of the files from the current directory into the Docker image
COPY . .

# exposes the port 5000 of the Docker container. This is the port that the Flask application will listen on.
EXPOSE 5000

# exexcute the flask app inside the container
CMD python3 app.py