Remove unnecessary config from deploy

Author: marc-gr

packages/gcp/_dev/deploy/docker/docker-compose.yml

@@ -4,9 +4,7 @@ services:
     image: google/cloud-sdk:emulators
     command: gcloud beta emulators pubsub start --host-port=0.0.0.0:8681
     ports:
-      - "8681:8681"
-    expose:
-      - "8681"
+      - "8681/tcp"
   gcppubsub-audit:
     image: akroh/stream:v0.3.0
     volumes: