Use explicit network aliases, add appservice registration script

servers/mautrix/meta/config.yaml

@@ -201,7 +201,7 @@ appservice:
     # Like the homeserver address, a local non-https address is recommended when the bridge is on the same machine.
     # If the bridge is elsewhere, you must secure the connection yourself (e.g. with https or wireguard)
     # If you want to use https, you need to use a reverse proxy. The bridge does not have TLS support built in.
-    address: http://mautrix-meta:29319
+    address: http://as-mautrix-meta:29319
     # A public address that external services can use to reach this appservice.
     # This is only needed for things like public media. A reverse proxy is generally necessary when using this field.
     # This value doesn't affect the registration file.

servers/mautrix/meta/registration.yaml

@@ -1,5 +1,5 @@
 id: meta
-url: http://mautrix-meta:29319
+url: http://as-mautrix-meta:29319
 as_token: 0lyeofAXPdUo8CGiaRSDf9AznhSn2uwVTWz7rk8uMjzgYoPVmml9HsVV69qw05GY
 hs_token: niBvXHLbGcwS85ytNyRqRQ4RLHtsE23n3nA62ufulH11Aui7nvVWXNr1Yc59qizm
 sender_localpart: Th7nrwqlBwmYlwg749Qa8IGlHYPjYQC5