Creating templates is a straightforward process, even for those unfamiliar
with Go Template. Here are a few things to keep in mind:
The template should be a single page, without additional css or js files. However, you can load them from a
CDN or other GitHub repositories using jsdelivr.com
Be sure to include the <meta name="robots" content="nofollow,noarchive,noindex"> tag in the header
You can use special "placeholders" (wrapped in {{ and }}) for the rendering error code, message, and other
details
Built-in "placeholders" and functions with their examples can be found in the following files: