feature:fix chatchan path

sites-available/chat

@@ -7,7 +7,7 @@ server {
         include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
         ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
 
-        root /var/www/http/chat;
+        root /var/www/html/chatchan;
         index index.html;
         location / {
             try_files $uri $uri/ =404;