FROM python:3.8-alpine

# install required packages
RUN apk add --no-cache gcc libc-dev libffi-dev openssl openssl-dev python3-dev 

# add user that will be used to install and run the application
RUN addgroup -g 1000 deploy
RUN adduser -D -u 1000 -G deploy deploy

# switch to the created user and install the application
USER deploy
ENV PATH "$PATH:/home/deploy/.local/bin"

COPY . /app
WORKDIR /app

RUN pip install --upgrade pip
RUN pip install gunicorn
RUN pip install wheel

RUN pip install -r requirements.txt
RUN flit install --pth-file

# switch back to root to remove header files
USER root
RUN apk del libc-dev libffi-dev openssl-dev python3-dev

# switch to the created user to run the application
USER deploy
CMD ["gunicorn", "--paster", "/app/production.ini", "-b", "0.0.0.0:8000"]