Allow bridge to update its own config and generate public_media signing key

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

@@ -39,7 +39,7 @@ matrix_steam_bridge_appservice_public_address: "https://{{ matrix_server_fqn_mat
 # Public media configuration for external access to bridge media
 matrix_steam_bridge_public_media_enabled: true
 # A key for signing public media URLs. If set to "generate", a random key will be generated.
-matrix_steam_bridge_public_media_signing_key: "generate"
+matrix_steam_bridge_public_media_signing_key: generate
 # Number of seconds that public media URLs are valid for. If set to 0, URLs will never expire.
 matrix_steam_bridge_public_media_expiry: 0
 matrix_steam_bridge_public_media_hash_length: 32

roles/custom/matrix-bridge-steam/templates/systemd/matrix-steam-bridge.service.j2

@@ -23,14 +23,14 @@ ExecStartPre={{ devture_systemd_docker_base_host_command_docker }} create \
 			--user={{ matrix_user_uid }}:{{ matrix_user_gid }} \
 			--cap-drop=ALL \
 			--network={{ matrix_steam_bridge_container_network }} \
-			--mount type=bind,src={{ matrix_steam_bridge_config_path }},dst=/app/config,ro \
+			--mount type=bind,src={{ matrix_steam_bridge_config_path }},dst=/app/config \
 			--mount type=bind,src={{ matrix_steam_bridge_data_path }},dst=/app/data \
 			--label-file={{ matrix_steam_bridge_base_path }}/labels \
 			{% for arg in matrix_steam_bridge_container_extra_arguments %}
 			{{ arg }} \
 			{% endfor %}
 			{{ matrix_steam_bridge_docker_image }} \
-			/usr/bin/steam -c /app/config/config.yaml -r /app/config/registration.yaml --no-update
+			/usr/bin/steam -c /app/config/config.yaml -r /app/config/registration.yaml
 
 {% for network in matrix_steam_bridge_container_additional_networks %}
 ExecStartPre={{ devture_systemd_docker_base_host_command_docker }} network connect {{ network }} matrix-steam-bridge