L2SS-194: Build PCC & SDP devices explicitly, since docker compose doesn't...

L2SS-194: Build PCC & SDP devices explicitly, since docker compose doesn't understand running multiple services from a single local base image.

Closes L2SS-194

This should work, at least, it works for me. @jurges maybe test this out for you as well?

docker-compose/device-pcc.yml

@@ -14,7 +14,11 @@ version: '2'
 
 services:
   device-pcc:
-    image: lofar-device-base
+    image: device-pcc
+    # build explicitly, as docker-compose does not understand a local image
+    # being shared among services.
+    build:
+        context: lofar-device-base
     container_name: ${CONTAINER_NAME_PREFIX}device-pcc
     network_mode: ${NETWORK_MODE}
     volumes: