improve install instructions re gcloud

give gcloud install link + clarify it must be dealt with before the docker

README.md

@@ -29,14 +29,10 @@ Install [Supabase Cli](https://supabase.com/docs/guides/cli/getting-started)
 
 Open [Supabase Studio](http://127.0.0.1:54323/project/default) locally.
 
-### Start API Server
-
-`docker compose up`
-
-This commands starts the server with Air that listens to changes. It connects to the Supabase running locally.
-
 ### Set up local ADC credentials
 
+Install GCloud CLI <https://cloud.google.com/sdk/docs/install>
+
 These are needed for authenticating Firebase JWT token auth + calling other GCP APIs.
 
 When testing login with registry, use this:
@@ -50,6 +46,12 @@ If you are testing creating a node, you need to impersonate a service account be
 
 TODO(robinhuang): Create a service account suitable for dev.
 
+### Start API Server
+
+`docker compose up`
+
+This commands starts the server with Air that listens to changes. It connects to the Supabase running locally.
+
 # Code Generation
 
 Make sure you install the golang packages locally.