Add image names to compose files which do a local build.

Config/HugoExample/docker-compose.example.yml

@@ -6,7 +6,7 @@ services:
     container_name: hugo
     build:
       context: ./
-    image: hyperling-hugo:$BRANCH
+    image: hyperling/hugo:$BRANCH
     restart: always
     ports:
       - $PROD_PORT:80  # Production minified files served using NGINX.