Expose mautrix-discord's avatar proxy

Possibly fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/3900

This patch hasn't been tested.

roles/custom/matrix-bridge-mautrix-discord/tasks/setup_install.yml

@@ -93,6 +93,16 @@
     owner: "{{ matrix_user_username }}"
     group: "{{ matrix_user_groupname }}"
 
+- name: Ensure mautrix-discord support files installed
+  ansible.builtin.template:
+    src: "{{ role_path }}/templates/{{ item }}.j2"
+    dest: "{{ matrix_mautrix_discord_base_path }}/{{ item }}"
+    mode: 0640
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+  with_items:
+    - labels
+
 - name: Ensure mautrix-discord container network is created
   community.general.docker_network:
     enable_ipv6: "{{ devture_systemd_docker_base_ipv6_enabled }}"