According to the docs found here:
https://cloud.google.com/appengine/docs/standard/php7/runtime#application_startup
My app, is able to serve up index.php, without defining any handlers in my app.yaml file, which it does. Great! However, that same app.yaml file fails to serve up index in my local environment (dev_appserver.py) That seems less than ideal...
The path to the file is public/index.php
Here's the error I see in my local when I go with the very same app.yaml that works perfectly in production:
The url "/" does not match any handlers.