Migrating content from a URL subfolder (example.com/docs/) to a standalone subdomain (docs.example.com) requires configuring 301/308 redirects in Nginx or Apache to preserve SEO search equity.

Nginx Subfolder to Subdomain Redirect Block

/etc/nginx/sites-available/defaultnginx
server {
    server_name example.com;
 
    # Redirect subfolder /docs/ to docs.example.com
    location /docs/ {
        rewrite ^/docs/(.*)$ https://docs.example.com/$1 permanent;
    }
}