An easy (and free) way to implement a Maintenance page using Cloudflare Webworkers.
- Prepare the webworker script. If you don't want to change any part of the website, you can skip this step. Make your changes to the html document, then Ctrl + A and Copy. Open the webworker file and replace everything between the ` symbols.
- Create a Cloudflare Webworker.
(More ways coming soon, you can already take a look at the screenshots)