Once you have built a static version of your MyST project via myst build --html, it can be served on an any common web server: Apache web server (httpd), nginx, or others.
For example, let’s assume your web server’s base URL is http://www.example.com and it uses /var/www/html as the file server root (DocumentRoot in httpd). If you copy the _build/html/ directory to /var/www/html/my-project using
cp -r _build/html /var/www/html/my-projectthen the resulting URL would be http://www.example.com/my-project, and you are all set if you have configured the base URL.