[Feedback]: Adding more variable to have better control over hostname

> **Page Affected:** https://rcac-docs-demo.readthedocs.io/userguides/gautschi/accounts/
> Please describe the issue you found on this page.

There was a discussion about using `{{ resource }}` in the macro snippet. Maybe we can define more variables in the md file? Like:

```
resource: gautschi
resource_name: Gautschi
```