Ok, i have to activate the App Engine on the google Cloud Plattform and now:
gcloud beta functions deploy openhabGoogleAssistant --stage-bucket staging.<PROJECT ID>.appspot.com --trigger-http
...
Copying file:///tmp/tmpjbmp_C/fun.zip [Content-Type=application/zip]...
/ [1 files][ 8.2 KiB/ 8.2 KiB]
Operation completed over 1 objects/8.2 KiB.
Deploying function (may take a while - up to 2 minutes)...done.
availableMemoryMb: 256
entryPoint: openhabGoogleAssistant
