roles/server/gitea: Reworked usage of nginx/proxy

roles/server/gitea/meta/main.yml

@@ -5,5 +5,5 @@ dependencies:
     database_user: "{{ gitea_database_user }}"
     database_pass: "{{ gitea_database_pass }}"
     database_name: "{{ gitea_database_name }}"
-  - role: nginx/socket
+  - role: nginx/proxy
-    socket: "{{ gitea_socket_path }}"
+    backend_socket: "{{ gitea_socket_path }}"