I've noticed all of the references to the Fully Qualified Domain Name "googleapis.com" are incorrectly formatted. Per RFC 1034 FQDN's should have a trailing dot in order to remove any ambiguity and unnecessary lookups.

Explanatory documentation HERE

We were pointed to this doc by a Kubernetes network engineer at Google after having many DNS lookup issues inside of our GKE clusters. After running some tests we noticed a minimum 100ms improvement per request after adding the trailing dot.

I have a PR ready that I will post for review.