Configure proxy to not respond to irrelevant requests

services/nginx/default.template.conf

@@ -21,6 +21,14 @@ server {
     return 301 https://$host$request_uri;
 }
 
+server {
+    listen 443 ssl default_server;
+
+    server_name _;
+
+    return 444;
+}
+
 server {
     listen 443 ssl;
     server_name gitea.${DOMAIN};