Add Zola template for .gitlab-ci.yml ✨

What does this MR do and why?

Add a Zola.gitlab-ci.yml template for Pages.

Zola is a static site engine

Screenshots or screen recordings

I created a demo repository at https://gitlab.com/homersimpsons/zola-demo you can see it deployed at https://homersimpsons.gitlab.io/zola-demo/

How to set up and validate locally

Not relevant, this is just a template.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Unresolved questions

• Should I create a GitLab issue to track this ? => Looks fine as it
• Should I use a docker image instead of alpine ? Zola provides a docker image but it has no latest tag
• Should a demo blog be made to https://gitlab.com/pages ? I will follow the Contribution Guidelines. => Done at https://gitlab.com/homersimpsons/zola-demo (may need to be imported to https://gitlab.com/pages)