Add support for serving base domain via matrix-nginx-proxy

group_vars/matrix-servers

@@ -246,6 +246,8 @@ matrix_ssl_domains_to_obtain_certificates_for: |
     ([matrix_server_fqn_riot] if matrix_riot_web_enabled else [])
     +
     ([matrix_server_fqn_dimension] if matrix_dimension_enabled else [])
+    +
+    ([matrix_domain] if matrix_nginx_proxy_base_domain_serving_enabled else [])
   }}
 
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