Docker image runs on heroku server but not locally

Question

I have a docker image that runs as expected from Heroku, but breaks when I try to run the image locally. When I run the image locally, I am not able to stop the image or open the Docker CLI. When I repeatedly hit stop, the container exits with a code of 137. I run the command docker build -t generate_test_service. from the project directory and simply press play from the Docker application.

Dockerfile

# start by pulling the python image
FROM alpine:latest

# copy the requirements file into the image
COPY ./requirements.txt /app/requirements.txt

# switch working directory
WORKDIR /app

# install the dependencies and packages in the requirements file
RUN apk update
RUN apk add py-pip
RUN apk add --no-cache python3-dev

ENV VIRTUAL_ENV=./venv
RUN python3 -m venv $VIRTUAL_ENV
ENV PATH="$VIRTUAL_ENV/bin:$PATH"

RUN pip install --upgrade pip
RUN apk add --update gcc libc-dev linux-headers && rm -rf /var/cache/apk/*
RUN pip install psutil
RUN pip --no-cache-dir install -r requirements.txt

# copy every content from the local file to the image
COPY . /app

# configure the container to run in an executed manner
ENTRYPOINT [ "python3" ]

CMD [ "app.py" ]

EXPOSE 4000

app.py

from flask import Flask
from flask import jsonify
import os 
app = Flask(__name__)

if __name__ == '__main__':
    port = os.environ.get("PORT", 5000)
    app.run(debug=False, host='0.0.0.0', port=port)