Hosting a Drupal site can come at a cost. You need to pay for hosting and have developer resources to provide security patches. If you have some Drupal (or other CMS) sites with a database backend hanging around that you're not quite ready to retire yet, but also not able to maintain, convert them to static websites (simple HTML, CSS, and Javascript files) and put them up on gh-pages for free!
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https://www.youtube.com/watch?v=SDEUW4UVS8c