Update procfile and startup for Heroku.

Author: WayneGoosen

Procfile

@@ -1 +1 @@
-web: gunicorn run:app
+web: gunicorn run:app -b 0.0.0.0:$PORT -w 3

run.py

@@ -1,6 +1,7 @@
+"""Create an application instance."""
 from app import create_app
 import os
 
-port = int(os.environ.get('PORT', 5000))
+#port = int(os.environ.get('PORT', 5000))
 app = create_app(env='prod') #Or pass 'live' to NOT be in debug mode
-app.run(host='0.0.0.0', port=port)
+#app.run(host='0.0.0.0', port=port)