Adjust docker-compose.yml overrides for newer docker-compose version

docker-compose.override.yml

@@ -2,12 +2,15 @@ version: '3.7'
 
 services:
         dashboard:
+                image: getumbrel/dashboard
                 build:
                   context: ../umbrel-dashboard
                   dockerfile: Dockerfile.dev
                 volumes:
                   - ../umbrel-dashboard:/app
         manager:
+                image: getumbrel/manager
                 build: ../umbrel-manager
         middleware:
+                image: getumbrel/middleware
                 build: ../umbrel-middleware