Dockerfile for automated docker deployment (#1)

* Initial Dockerfile

* Dockerfile: install without caching in production

* dockerfile: added ARG/ENV for deployment dir

* dockerfile: removed unnecessary tinkering with PYTHONPATH

* dockerfile: added ARG/ENV for listening port

* dockerfile: added cleanup of tests and makefile

* dockerfile: added health check

stw_potsdam/views.py

@@ -54,3 +54,7 @@ def canteen_feed(canteen_name):
     canteen = config[canteen_name]
     menu = get_menu_cached(canteen)
     return canteen_feed_xml(canteen, menu)
+
+@app.route('/health_check')
+def health_check():
+    return make_response("OK", 200)