Docs: deploy lakeFS on Google Cloud Platform

[nopcoder]

The page describing how to deploy lakeFS on GCP https://docs.lakefs.io/deploy/gcp.html, doesn't the complete information on how to deploy lakeFS on Google.

The page describe the lakeFS's configuration (yaml) recommended to use with Google Storage, but doesn't show how to setup such credentials as the storage step is found under "Prepare your storage" in "Set up lakeFS" which is the next step.

Running lakeFS with Docker on GCE will not provide public access as there is no wait to open direct port.

The first step instruct how to setup PostgresSQL instance and link to how to setup a auth proxy which required on the next step when you are running lakeFS with docker or google cloud run. There should be at least one set of instructions that the user can follow and it will work.

The title "On Google Cloud Run" - doesn't really explains how to run lakeFS with this service. It explains how to run lakeFS using Docker and specify "To support container-based environments like Google Cloud Run...". Google Cloud Run doesn't accept docker run command and doesn't use images found in external registries.