What are the variables in api.mustache template?

Documentation link

Missing documentation for https://github.com/PaloAltoNetworks/docusaurus-openapi-docs/blob/6c12cd7fcd74e4fe8c8b02137ee1077daad136ac/demo/api.mustache.

Describe the problem

Every time I regenerate API docs, the api: variable keep changing in all the generated mdx files and it's usually a long string of characters. This is very distracting for code reviews and in git history. I can't find documentation on what it actually is. I also can't find documentation for all other variables in that api.mustache template, which makes it very hard for me to customize the template.

Suggested fix

1. Add documentation to explain what the api: variable is and how we can configure the project such that it doesn't have to change every time we regenerate the mdx files.
2. Add documentation to explain what each of the variables in api.mustache template.

Start with demo/api.mustache at the linked revision and compare its variables with the generated MDX files. Trace the source of the changing api: value and the project configuration that controls it. Done means documentation explains that value, how to keep it stable, and every variable available in the template.