Flask in Docker - productionised with simplicity

Dockerfile

FROM python

# From the python:onbuild image
# For discussion of onbuild variant images see: https://hub.docker.com/_/python/
WORKDIR /usr/src/app
COPY . /usr/src/app
RUN pip install --no-cache-dir -r requirements.txt

# Install uWSGI
RUN pip install uwsgi

# Non-root user
# https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/#user
RUN groupadd -r uwsgi && useradd -r -g uwsgi uwsgi
USER uwsgi

# Server
#
# We're using plain HTTP for simplicity but see also "uwsgi_pass" for Nginx:
# http://flask.pocoo.org/docs/0.12/deploying/uwsgi/
#
# Inspired by:
# https://www.smartfile.com/blog/dockerizing-a-python-flask-application/
#
# This assumes your main file is called "app.py" and your callable is called "app":
ENV PORT 5000
CMD uwsgi --http 0.0.0.0:$PORT --module app:app --processes 1 --threads 8