Update asciinema.subdomain.conf.sample

Added block for the /dashboard

Currently it's an unfinished dash, but author says it's in the works:

https://discourse.asciinema.org/t/2-questions-1-post/920/2?u=j_scott_elblein

Author: STaRDoGG

asciinema.subdomain.conf.sample

@@ -1,4 +1,4 @@
-## Version 2025/01/17
+## Version 2025/02/21
 # make sure that your asciinema container is named asciinema
 # make sure that your dns has a cname set for asciinema
 
@@ -42,4 +42,26 @@ server {
         set $upstream_proto http;
         proxy_pass $upstream_proto://$upstream_app:$upstream_port;
     }
+
+    location ~ (/asciinema)?/dashboard {
+        # enable the next two lines for http auth
+        #auth_basic "Restricted";
+        #auth_basic_user_file /config/nginx/.htpasswd;
+
+        # enable for ldap auth (requires ldap-server.conf in the server block)
+        #include /config/nginx/ldap-location.conf;
+
+        # enable for Authelia (requires authelia-server.conf in the server block)
+        #include /config/nginx/authelia-location.conf;
+
+        # enable for Authentik (requires authentik-server.conf in the server block)
+        #include /config/nginx/authentik-location.conf;
+
+        include /config/nginx/proxy.conf;
+        include /config/nginx/resolver.conf;
+        set $upstream_app asciinema;
+        set $upstream_port 4002;
+        set $upstream_proto http;
+        proxy_pass $upstream_proto://$upstream_app:$upstream_port;
+    }
 }