Update u_e-nginx.md

docs/u_e-nginx.md

@@ -4,6 +4,30 @@ To create persistent (over updates) sites hosted by mailcow: dockerized, a new s
 nano data/conf/nginx/my_custom_site.conf
 ```
 
+A good template to begin with.
+
+``` hl_lines="9"
+server {
+  ssl_certificate /etc/ssl/mail/cert.pem;
+  ssl_certificate_key /etc/ssl/mail/key.pem;
+  index index.php index.html;
+  client_max_body_size 0;
+  root /web;
+  include /etc/nginx/conf.d/listen_plain.active;
+  include /etc/nginx/conf.d/listen_ssl.active;
+  server_name mysite.example.org;
+
+  location ^~ /.well-known/acme-challenge/ {
+    allow all;
+    default_type "text/plain";
+  }
+
+  if ($scheme = http) {
+    return 301 https://$server_name$request_uri;
+  }
+}
+```
+
 The filename is not important, as long as the filename carries a .conf extension.
 
 It is also possible to extend the configuration of the default file `site.conf` file: