Add default appservice public address - set public_media to false by default for testing

roles/custom/matrix-bridge-steam/defaults/main.yml

@@ -35,7 +35,7 @@ matrix_steam_bridge_msc4190_enabled: "{{ matrix_bridges_msc4190_enabled }}"
 
 # A public address that external services can use to reach this appservice
 # TODO: This is probably necessary for public media?
-matrix_steam_bridge_appservice_public_address: ''
+matrix_steam_bridge_appservice_public_address: "https://{{ matrix_server_fqn_matrix }}"
 
 # Displayname template for Steam users
 # {{ .DisplayName }} is replaced with the display name of the Steam user

roles/custom/matrix-bridge-steam/templates/config.yaml.j2

@@ -284,7 +284,7 @@ provisioning:
 public_media:
     # Should public media be enabled at all?
     # The public_address field under the appservice section MUST be set when enabling public media.
-    enabled: true
+    enabled: false
     # A key for signing public media URLs.
     # If set to "generate", a random key will be generated.
     signing_key: "generate"