Make Element Call role not reference foreign variables (except the matrix-base ones)

roles/custom/matrix-element-call/tasks/install.yml

@@ -5,7 +5,6 @@
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
 ---
-# roles/custom/matrix-element-call/tasks/install.yml
 
 - name: Ensure Element Call paths exist
   ansible.builtin.file:
@@ -16,7 +15,6 @@
     group: "{{ matrix_user_groupname }}"
   with_items:
     - path: "{{ matrix_element_call_base_path }}"
-    - path: "{{ matrix_base_data_path }}/static-files/public/.well-known/element"  # Directory for element.json
 
 - name: Ensure Element Call config.json is in place
   ansible.builtin.template:

roles/custom/matrix-element-call/tasks/validate_config.yml

@@ -14,6 +14,7 @@
   with_items:
     - {'name': 'matrix_element_call_container_network', when: true}
     - {'name': 'matrix_element_call_hostname', when: true}
+    - {'name': 'matrix_element_call_config_livekit_livekit_service_url', when: true}
 
 # Element Call appears to hardcode all paths to `/` (e.g. `/config.json`, `/assets/...`).
 # While we can properly serve the homepage and handle stripping the path prefix on our side,