Adding production app.yaml to source control

Background: There does not appear to be a production version of
the app.yaml file for the developer.android.com site checked in
anywhere, which strikes me as a bit dangerous; We should be able
to replicate the DAC site entirely from source control.

Change-Id: I119c6052b94fe89e973ebb7e3902a9c0566f83ca

scripts/app_engine_server/app.yaml.production

@@ -0,0 +1,16 @@
+application: androiddevdocs
+version: 1
+runtime: python
+api_version: 1
+
+handlers:
+- url: /gae_shell/static
+  static_dir: gae_shell/static
+  expiration: 1d
+
+- url: /gae_shell/.*
+  script: /gae_shell/shell.py
+  login: admin
+
+- url: .*
+  script: main.py