fix permissions

install.sh

@@ -173,10 +173,10 @@ sudo cp templates/nginx.cfg /etc/nginx/sites-enabled/default
 )
 sudo systemctl restart nginx
 if [ ! -e /var/www/wx/index.html ]; then
-    cp templates/index.html /var/www/wx/index.html
+    sudo cp templates/index.html /var/www/wx/index.html
 fi
 if [ ! -e /var/www/wx/logo-small.png ]; then
-    cp templates/logo-small.png /var/www/wx/logo-small.png
+    sudo cp templates/logo-small.png /var/www/wx/logo-small.png
 fi
 log_done "Nginx configured"