Give hc-network a name

I was wrong. It's not the container name but I forgot simply to give the
network the very same name as specified in the docker-compose.yml of the
frontend

docker-compose.override.yml

@@ -9,7 +9,3 @@ services:
     ports:
       - 7687:7687
       - 7474:7474
-
-networks:
-  hc-network:
-    name: hc-network

docker-compose.yml

@@ -2,7 +2,6 @@ version: "3.7"
 
 services:
   backend:
-    container_name: backend
     image: humanconnection/nitro-backend:latest
     build: .
     networks:
@@ -33,6 +32,7 @@ services:
 
 networks:
   hc-network:
+    name: hc-network
 
 volumes:
   neo4j-data: