Dockerfile

# pull official base image
FROM python:3.9.6-alpine

RUN apk update && apk add gcc libc-dev make git libffi-dev openssl-dev python3-dev libxml2-dev libxslt-dev

# set work directory
WORKDIR /usr/src/app

# set environment variables
ENV PYTHONDONTWRITEBYTECODE 1 # запрещает Python записывать файлы pyc на диск (эквивалент опции python -B)
ENV PYTHONUNBUFFERED 1 # запрещает Python буферизовать stdout и stderr (эквивалент опции python -u)

# install psycopg2 dependencies
RUN apk update \
    && apk add postgresql-dev gcc python3-dev musl-dev

# install dependencies
RUN pip install --upgrade pip
COPY ./requirements.txt .
RUN pip --no-cache-dir install -r requirements.txt

# copy entrypoint.sh
COPY ./entrypoint.sh .
RUN sed -i 's/\r$//g' /usr/src/app/entrypoint.sh
RUN chmod +x /usr/src/app/entrypoint.sh

# copy project
COPY . .

# run entrypoint.sh
ENTRYPOINT ["/usr/src/app/entrypoint.sh"]