from proxypool.

Ty
Tried to modified Dockerbuild like that :

FROM python:3.7-alpine AS build
COPY requirements.txt /tmp/requirements.txt
RUN apk update &&
apk add --no-cache gcc bash g++ libffi-dev openssl-dev libxml2-dev libxslt-dev build-base musl-dev &&
pip install -U pip &&
pip install --timeout 30 --user --no-cache-dir --no-warn-script-location -r /tmp/requirements.txt -i https://pypi.douban.com/simple

FROM python:3.7-alpine
ENV APP_ENV=prod
ENV LOCAL_PKG="/root/.local"
COPY --from=build ${LOCAL_PKG} ${LOCAL_PKG}
ENV HEROKU_EXEC_DEBUG=1
RUN apk update && apk add --no-cache libffi-dev openssl-dev libxslt-dev &&
ln -sf ${LOCAL_PKG}/bin/* /usr/local/bin/

Set the working directory to /app

WORKDIR /app

Copy the current directory contents into the container at /app

COPY . /app

Expose port 3000 for accessing the app

EXPOSE 5555

This allows Heroku bind its PORT the Apps port

since Heroku needs to use its own PORT before the App can be made accessible to the World

EXPOSE $PORT
RUN adduser -D myuser
USER myuser
CMD chmod +x supervisord
ENTRYPOINT ["/bin/sh"]
CMD python run.py

Like i found on internet, no persistant folder, expose should be a variable and script dont allowed to run at root

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