Use local docker registry to push and pull app images

test/integration/docker/deployer/app/config/deploy.yml

@@ -2,12 +2,12 @@ service: app
 image: app
 servers:
   - vm1
-  - vm2: [ tag1, tag2 ]
+  - vm2: [tag1, tag2]
 env:
   clear:
     CLEAR_TOKEN: 4321
-    CLEAR_TAG: ""
-    HOST_TOKEN: "${HOST_TOKEN}"
+    CLEAR_TAG: ''
+    HOST_TOKEN: '${HOST_TOKEN}'
   secret:
     - SECRET_TOKEN
     - INTERPOLATED_SECRET1
@@ -26,9 +26,7 @@ readiness_delay: 0
 proxy:
   host: 127.0.0.1
 registry:
-  server: registry:4443
-  username: root
-  password: root
+  server: localhost:5000
 builder:
   driver: docker
   arch: <%= Kamal::Utils.docker_arch %>