Add a status endpoint that we can use to test if the instance is serving traffic.

endpoints/web.py

@@ -1,7 +1,7 @@
 import logging
 
 from flask import (abort, send_file, redirect, request, url_for,
-                   render_template)
+                   render_template, make_response)
 from flask.ext.login import login_user, UserMixin, login_required, logout_user
 from flask.ext.principal import identity_changed, Identity, AnonymousIdentity
 
@@ -38,6 +38,11 @@ def index():
   return send_file('templates/index.html')
 
 
+@app.route('/status', methods=['GET'])
+def status():
+  return make_response('Healthy')
+
+
 @app.route('/tos', methods=['GET'])
 def tos():
   return send_file('templates/tos.html')