Reduce fly resources for dashboard (#34032)

Now that we are using a production build in the dashboard we don't need to use as much RAM on the fly machine.

GitOrigin-RevId: 5d6cb81cf96a0869710af21081d0dc84897a39fe

Author: emmaling27

self-hosted/dashboard/fly.toml

@@ -26,7 +26,6 @@ handlers = ["tls", "http"]
 port = 443
 
 [[vm]]
-# TODO: Reduce this once dashboard Dockerfile is cleaned up.
-memory = '4gb'
-cpu_kind = 'performance'
+memory = '1gb'
+cpu_kind = 'shared'
 cpus = 1