FROM python:3.8-alpine

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

# add user that will be used to install and run the application
RUN adduser -D 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 delete python3-dev
RUN apk delete libffi-dev
RUN apk delete openssl-dev

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