Add software role and matrix federation button

roles/gatus/vars/main.yml

@@ -9,9 +9,11 @@ gatus_external_endpoints_backups: "{{ vault_hosts | vault_hosts_backup_to_gatus(
 gatus_endpoints_hosts: "{{ opentofu.hosts | hosts_to_gatus() }}"
 gatus_endpoints_services: "{{ all_services | services_to_gatus() }}"
 
+gatus_federation_tester: "https://federationtester.matrix.org/api/report?server_name=msrg.cc"
+
 gatus_endpoints_other:
   - name: matrix-federation
-    url: https://federationtester.matrix.org/api/report?server_name=msrg.cc
+    url: "{{ gatus_federation_tester }}"
     group: 9-external
     interval: 5m
     conditions:
@@ -51,6 +53,11 @@ gatus_yml:
       client-secret: "{{ opentofu.authentik_data.gatus.client_secret }}"
       scopes: ["openid"]
 
+  ui:
+    buttons:
+      - name: Matrix Federation Tester
+        link: "{{ gatus_federation_tester }}"
+
   alerting:
     email: "{{ vault_gatus.alerting.email }}"
     ntfy: "{{ vault_gatus.alerting.ntfy }}"