Configuring the WSGI server with a Procfile on Elastic Beanstalk
You can add a Procfile to your source bundle to specify and configure the WSGI
      server for your application.  You can specify custom start and run commands in the Procfile.
When you use a Procfile, it overrides aws:elasticbeanstalk:container:python namespace options that you set using
      configuration files.
The following example uses a Procfile to specify uWSGI as the server and configure it.
Example Procfile
web: uwsgi --http :8000 --wsgi-file application.py --master --processes 4 --threads 2
The following example uses a Procfile to configure Gunicorn, the default WSGI server.
Example Procfile
web: gunicorn --bind :8000 --workers 3 --threads 2 project.wsgi:application
Notes
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If you configure any WSGI server other than Gunicorn, be sure to also specify it as a dependency of your application, so that it is installed on your environment instances. For details about dependency specification, see Specifying dependencies using a requirements file on Elastic Beanstalk.
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The default port for the WSGI server is 8000. If you specify a different port number in your
Procfilecommand, set thePORTenvironment property to this port number too.