Debug causes App Engine to fail building, output looks like this: ``` ERROR 2015-03-22 04:15:01,027 http_runtime.py:285] bad runtime process port ['[GIN-debug] GET / --> web.func\xc2\xb7001 (1 handlers)\n'] ``` Setting to ReleaseMode fixes this.
Modified ping path and added a comment explaining why init() is called like that.