We do support Server Side Includes.
SSI are tags that are placed in HTML pages and are pulled from the server into the HTML page when the page is being served. This allows customers to add dynamically generated content to an existing HTML page without having to generate the page via a content management system or other software.
For example, if you have many static HTML pages, and each page has the same menu on it, you can use an SSI to generate that menu, saving you from changing every single static page when you need to change the menu.
SSIs are usually added into HTML pages like so:
<!--#include virtual=”/file.html” -->
When using SSIs, it is recommended that your files are named with a .shtml extension, to ensure that the server recognises that you are using SSIs. However, this can be changed via editing your .htaccess file if you choose to.