hotfix: development environment hot reload fix

[lovellfelix]

This PR enable hot reload using docker compose file. The current implement run Flask in production mode and the following exception is thrown.

web_1    |  * Running on http://0.0.0.0:5001/ (Press CTRL+C to quit)
web_1    |  * Serving Flask app "app" (lazy loading)
web_1    |  * Environment: production
web_1    |    WARNING: Do not use the development server in a production environment.
web_1    |    Use a production WSGI server instead.
web_1    |  * Debug mode: on
web_1    |  * Restarting with stat
web_1    | Traceback (most recent call last):
web_1    |   File "app.py", line 38, in <module>
web_1    |     app.run(host='0.0.0.0', port='5001')
web_1    |   File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 943, in run
web_1    |     run_simple(host, port, self, **options)
web_1    |   File "/usr/local/lib/python3.6/site-packages/werkzeug/serving.py", line 1007, in run_simple
web_1    |     run_with_reloader(inner, extra_files, reloader_interval, reloader_type)
web_1    |   File "/usr/local/lib/python3.6/site-packages/werkzeug/_reloader.py", line 332, in run_with_reloader
web_1    |     sys.exit(reloader.restart_with_reloader())
web_1    |   File "/usr/local/lib/python3.6/site-packages/werkzeug/_reloader.py", line 176, in restart_with_reloader
web_1    |     exit_code = subprocess.call(args, env=new_environ, close_fds=False)
web_1    |   File "/usr/local/lib/python3.6/subprocess.py", line 287, in call
web_1    |     with Popen(*popenargs, **kwargs) as p:
web_1    |   File "/usr/local/lib/python3.6/subprocess.py", line 729, in __init__
web_1    |     restore_signals, start_new_session)
web_1    |   File "/usr/local/lib/python3.6/subprocess.py", line 1364, in _execute_child
web_1    |     raise child_exception_type(errno_num, err_msg, err_filename)
web_1    | PermissionError: [Errno 13] Permission denied: '/api/app.py'

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[mattkohl]

Thanks for this.

Rather than make these changes here, could we update Dockerfile.dev?

If I'm understanding correctly, we could get away with replacing

ENTRYPOINT [ "python" ]

CMD [ "app.py" ]

with

CMD [ "flask", "run", "--host=0.0.0.0", "--port=5001"]

yes?

[lovellfelix]

Agreed.

[lovellfelix]

Title updated to capture pull request intent

[mattkohl]

LGTM! Thank you!!