add noindex parameter

[stdevel]

This PR adds the possibility to set the noindex meta parameter in order to preventing search engine from indexing a particular post or page.

To enable it, the following line needs to be added to the front matter:

noindex: true

Successfully tested on one of my websites.

Pull Request type

• Bug-fix
• Feature (functionality, design, translations, etc.)
• Documentation change
• Project management (tests, CI, GitHub configuration, etc.)
• Other (please describe):

Current state

All pages or posts can be indexed by search engines.

Issue Number(s): #465

Proposed changes

It adds a parameter noindex that can be set in the front matter. If set, the following HTML meta tag is set:

<meta name="robots" content="noindex" />

Screenshots, if applicable

Checklist

• Bug-fixes and new features: I have tested locally with the latest release of Hugo extended. This requirement is a standard.
• Bug-fixes, new features, and doc changes: I have updated the relevant documentation as part of this PR.
• All PRs: I have signed off (using git commit -s ...), or if not possible due to developer environment constraints, will comment below confirming that I am adhering to the Developer Certificate of Origin.

I work consistent with the Developer Certificate of Origin.

[rterakedis]

Hello @stdevel,

It looks like you added "noindex" in the Site Params section in the README file (i.e. .Site.Params.noindex). However, in the partial you've referenced the Page params (from the front matter of a page): {{ if .Params.noindex }}

You may need to move the row in the README table down into the Page Params section if that's the intent of the partial.

[stdevel]

Hi @rterakedis,
you're so right - thanks for pointing out!

I added another commit to fix this.
Let me know if this works for you now.