fixed unnamed valumes

docker-compose.yml

@@ -15,13 +15,16 @@ services:
       context: ./webhooks-git
       dockerfile: Dockerfile
     volumes:
-      - static-files:/etc/static-files
+      - static-files: /etc/static-files
 
 volumes:
   static-files:
+    name: static-files
     external: true
   webhooks-git-ssh:
+    name: webhooks-git-ssh
     external: true
   webhooks-git-data:
+    name: webhooks-git-data
     external: true