Dockerfile for Django, python-slim (requirements had Twisted which caused gcc and other errors)

Dockerfile

FROM python:3.8-slim

ENV PYTHONUNBUFFERED=1
RUN mkdir /code
WORKDIR /code
COPY requirements.txt /code/

RUN apt-get update \
    && apt-get install -y --no-install-recommends gcc build-essential \
    && pip3 install -r requirements.txt \
    && rm -rf /var/lib/apt/lists/* \
    && apt-get purge -y --auto-remove gcc build-essential

COPY . /code/