add python cloud function

cloud-functions/python/functions/main.py

@@ -0,0 +1,17 @@
+# Deploy with `firebase deploy`
+
+from firebase_functions import https_fn
+from firebase_admin import initialize_app
+
+# initialize_app()
+#
+#
+# @https_fn.on_request()
+# def on_request_example(req: https_fn.Request) -> https_fn.Response:
+#     return https_fn.Response("Hello world!")
+
+initialize_app()
+
+@https_fn.on_request()
+def on_request_example(req: https_fn.Request) -> https_fn.Response:
+    return https_fn.Response("Hello world!")

cloud-functions/python/functions/requirements.txt

@@ -0,0 +1 @@
+firebase_functions~=0.1.0