fix(compose/net): make web network mandatory

compose.net.yml

@@ -1,4 +1,11 @@
 name: funkwhale-net
+networks:
+  web:
+    external: true
+
+x-networks: &networks
+  - web
+
 include:
   - path: compose/net.dnsmasq.yml
   - path: compose/net.traefik.yml
@@ -12,4 +19,14 @@ include:
   # Comment out the following line if you have other containers
   # present on the docker0 network.
   - path: compose/net.helpers.docker0.yml
-  - path: compose/net.verify.yml
+services:
+  verify-external-connectivity:
+    extends:
+      file: compose/net.verify.yml
+      service: verify-external-connectivity
+    networks: *networks
+  verify-internal-connectivity:
+    extends:
+      file: compose/net.verify.yml
+      service: verify-internal-connectivity
+    networks: *networks

compose/net.verify.yml

@@ -1,7 +1,6 @@
 x-verify: &verify
   init: true
   image: "busybox"
-  network_mode: bridge
   dns: 172.17.0.1
   dns_search: funkwhale.test