Be consistent about how we run samples locally (GoogleCloudPlatform#1881)

Author: di

appengine/standard_python37/bigquery/main.py

@@ -39,5 +39,8 @@ def main():
 
 
 if __name__ == '__main__':
-    app.run(debug=True)
+    # This is used when running locally only. When deploying to Google App
+    # Engine, a webserver process such as Gunicorn will serve the app. This
+    # can be configured by adding an `entrypoint` to app.yaml.
+    app.run(host='127.0.0.1', port=8080, debug=True)
 # [END gae_python37_bigquery]

appengine/standard_python37/redis/main.py

@@ -39,5 +39,7 @@ def index():
 
 
 if __name__ == '__main__':
-    # This is used when running locally.
+    # This is used when running locally only. When deploying to Google App
+    # Engine, a webserver process such as Gunicorn will serve the app. This
+    # can be configured by adding an `entrypoint` to app.yaml.
     app.run(host='127.0.0.1', port=8080, debug=True)