# pull official base image
FROM python:3.8-slim-buster

# set work directory
WORKDIR /usr/src/app

# set environment variables
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1

# copy requirements and wheelhouse first (for caching)
COPY requirements.txt .
COPY wheelhouse/ ./wheelhouse/

# install system dependencies
RUN apt-get update && \
    apt-get install -y gcc pkg-config default-libmysqlclient-dev python3-dev vim systemd && \
    apt-get clean

# install Python dependencies from .whl
RUN pip install --upgrade pip && \
    pip install --no-index --find-links=wheelhouse -r requirements.txt

# copy actual project source code
COPY . /usr/src/app/

# collect static files
RUN python manage.py collectstatic --noinput

# expose the port
EXPOSE 8000

# run using gunicorn
CMD ["gunicorn", "--workers=3", "--bind=0.0.0.0:8000", "drf_prj.wsgi:application"]