Add joafri image metadata in compose and multi-arch build/push script

Apps/caddy-autogen/docker-compose.yaml

@@ -1,7 +1,12 @@
 name: caddy-autogen
 
+x-image:
+  namespace: ${IMAGE_NAMESPACE:-joafri}
+  tag: ${IMAGE_TAG:-main}
+
 services:
   caddy:
+    image: ${IMAGE_NAMESPACE:-joafri}/caddy-autogen-caddy:${IMAGE_TAG:-main}
     build:
       context: ./caddy
       dockerfile: Dockerfile
@@ -79,6 +84,7 @@ services:
       - ALL
 
   discovery-agent:
+    image: ${IMAGE_NAMESPACE:-joafri}/caddy-autogen-discovery-agent:${IMAGE_TAG:-main}
     build:
       context: ./agent
       dockerfile: Dockerfile