cluster: use latest staged images

ad991b7 disabled image pull because that pointed to release
images and often times they had conflicts with local files
in the repository.

As we now have staged images published on merge, we can try
pulling images without forcing local builds (or local .yml
editing).

Also, Compose warns about 'version' being obsolete so drop
that too, while we're at it.

Signed-off-by: Mikko Ylinen <[email protected]>

docker-compose.yml

@@ -1,10 +1,9 @@
-version: '3.2'
 services:
   kbs:
     build:
       context: .
       dockerfile: kbs/docker/coco-as-grpc/Dockerfile
-    #image: ghcr.io/confidential-containers/key-broker-service:latest
+    image: ghcr.io/confidential-containers/staged-images/kbs-grpc-as:latest
     command: [
         "/usr/local/bin/kbs",
         "--config-file",
@@ -24,7 +23,7 @@ services:
     build:
       context: .
       dockerfile: attestation-service/docker/as-grpc/Dockerfile
-    #image: ghcr.io/confidential-containers/attestation-service:latest
+    image: ghcr.io/confidential-containers/staged-images/coco-as-grpc:latest
     ports:
     - "50004:50004"
     restart: always
@@ -43,10 +42,10 @@ services:
     - rvps
 
   rvps:
-    #image: ghcr.io/confidential-containers/reference-value-provider-service:latest
     build:
       context: .
       dockerfile: rvps/docker/Dockerfile
+    image: ghcr.io/confidential-containers/staged-images/rvps:latest
     restart: always # keep the server running
     ports:
       - "50003:50003"