Add public url for gitlab hookshot to autocreate webhook on gitlab instance

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

@@ -125,6 +125,7 @@ matrix_hookshot_gitlab_instances:
 
 # This will be the "Secret token" you have to enter into all GitLab instances for authentication
 matrix_hookshot_gitlab_webhook_secret: ''
+matrix_hookshot_gitlab_webhook_publicUrl: "{{ matrix_hookshot_urlprefix }}{{ matrix_hookshot_webhook_endpoint }}"
 
 
 matrix_hookshot_figma_enabled: false

roles/custom/matrix-bridge-hookshot/templates/config.yml.j2

@@ -47,6 +47,7 @@ gitlab:
   instances: {{ matrix_hookshot_gitlab_instances | to_json }}
   webhook:
     secret: {{ matrix_hookshot_gitlab_webhook_secret | to_json }}
+    publicUrl: {{ matrix_hookshot_gitlab_webhook_publicUrl | to_json }}
 {% endif %}
 {% if matrix_hookshot_figma_enabled %}
 figma: