feat(compose.net): switch docker0 helper container to default

compose.net.yml

@@ -2,8 +2,13 @@ name: funkwhale-services
 include:
   - path: compose/net.dnsmasq.yml
   - path: compose/net.traefik.yml
-  # Uncomment the following line if your docker0 network does
-  # not stay up, since it is empty and has no containers
-  # attached to it.
-  # - path: compose/net.helpers.docker0.yml
+  # Nowadays people rarely use the default `bridge` network in
+  # Docker (called `docker0` on the host system), why it often
+  # has no containers present.
+  # While we try to attach to the interface with the two services
+  # above, its link state will only be `UP` if at least one
+  # containers is connected, what this noop helper is for.
+  # 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