Download missing images using our own registry

Any images missing from the artefact.skatelescope.org registry are now
configured to be downloaded from git.astron.nl:5000

docker-compose/.env

 DOCKER_REGISTRY_HOST=artefact.skatelescope.org
 DOCKER_REGISTRY_USER=ska-tango-images
+LOCAL_DOCKER_REGISTRY_HOST=git.astron.nl:5000
+LOCAL_DOCKER_REGISTRY_USER=lofar2.0/tango

docker-compose/archiver.yml

@@ -2,7 +2,7 @@ version: '2'
 
 services:
   archiver-maria-db:
-    image: ${DOCKER_REGISTRY_HOST}/${DOCKER_REGISTRY_USER}/mariadb_hdbpp:latest
+    image: ${LOCAL_DOCKER_REGISTRY_HOST}/${LOCAL_DOCKER_REGISTRY_USER}/mariadb_hdbpp:2021-05-28
     container_name: archiver-maria-db
     network_mode: ${NETWORK_MODE}
     depends_on:
@@ -17,7 +17,7 @@ services:
     restart: on-failure
 
   hdbpp-es:
-      image: ${DOCKER_REGISTRY_HOST}/${DOCKER_REGISTRY_USER}/tango-archiver:latest
+      image: ${LOCAL_DOCKER_REGISTRY_HOST}/${LOCAL_DOCKER_REGISTRY_USER}/tango-archiver:2021-05-28
       network_mode: ${NETWORK_MODE}
       container_name: hdbpp-es
       depends_on:
@@ -34,7 +34,7 @@ services:
                hdbppes-srv 01"
 
   hdbpp-cm:
-      image: ${DOCKER_REGISTRY_HOST}/${DOCKER_REGISTRY_USER}/tango-archiver:latest
+      image: ${LOCAL_DOCKER_REGISTRY_HOST}/${LOCAL_DOCKER_REGISTRY_USER}/tango-archiver:2021-05-28
       network_mode: ${NETWORK_MODE}
       container_name: hdbpp-cm
       depends_on:

docker-compose/astor.yml

@@ -31,7 +31,7 @@ services:
       - /usr/local/bin/astor
 
   starter-example:
-    image: ${DOCKER_REGISTRY_HOST}/${DOCKER_REGISTRY_USER}/tango-starter:latest
+    image: ${LOCAL_DOCKER_REGISTRY_HOST}/${LOCAL_DOCKER_REGISTRY_USER}/tango-starter:2021-05-28
     container_name: ${CONTAINER_NAME_PREFIX}starter-example
     network_mode: ${NETWORK_MODE}
     # set the hostname, otherwise duplicate device registrations result every

docker-compose/hdbpp_viewer.yml

@@ -10,7 +10,7 @@ version: '2'
 
 services:
   hdbpp-viewer:
-    image: ${DOCKER_REGISTRY_HOST}/${DOCKER_REGISTRY_USER}/hdbpp_viewer:latest
+    image: ${LOCAL_DOCKER_REGISTRY_HOST}/${LOCAL_DOCKER_REGISTRY_USER}/hdbpp_viewer:2021-05-28
     container_name: ${CONTAINER_NAME_PREFIX}hdbpp-viewer
     network_mode: ${NETWORK_MODE}
     depends_on: