fix: proper URLs in https://updates.jenkins.io/index.html

[lemeurherve]

This change replaces the relative URLs in URLs and footer of the base HTML fetched from https://www.jenkins.io/templates/updates/index.html defined in https://github.com/jenkins-infra/jenkins.io/blob/master/content/templates/updates.adoc by absolute ones, and set the proper attributes for jio-components.

Ref:

• Bunch of bad links on https://updates.jenkins.io/ and https://get.jenkins.io helpdesk#4882

Testing done

$ wget -q --convert-links -O index-original.html --convert-links https://www.jenkins.io/templates/updates/index.html
$ cp index-original.html index-fixed-links.html
$ sed -i '' \
  -e 's|href="/|href="https://www.jenkins.io/|g' \
  -e 's|property="https://www.jenkins.io"|property="https://updates.jenkins.io"|g' \
  -e 's|sourcepath=""|sourcepath="content/templates/updates.adoc"|' \
  index-fixed-links.html

Then opened index-fixed-links.html in a browser to check that all links in the navbar (notably the "Security" ones), in the body ("See Publishing Experimental Plugin Releases for more information.") and in the footer correctly point to jenkins.io if need, and that "Report an issue" has the correct info passed to the issue template of jenkins.io¹.

Footnotes

1. I initially wanted to point it to an helpdesk issue, but the helpesk template doesn't have a problem field, and jio-component doesn't have any attribute like sourcepath to also define the field to fill. ↩

[daniel-beck]

How does this relate to #670 and does the feedback I left there also apply here?

In general, I'd like an opportunity to review PRs in this repo unless it concerns purely the infra distribution site, or is urgent. This seems to be neither.

[lemeurherve]

How does this relate to #670 and does the feedback I left there also apply here?

Taking a look. (did not notice this PR before)

In general, I'd like an opportunity to review PRs in this repo unless it concerns purely the infra distribution site, or is urgent. This seems to be neither.

My bad sorry, noted!

[lemeurherve]

How does this relate to #670 and does the feedback I left there also apply here?

@daniel-beck: yes and yes, reworking my fix.

Opened a revert PR meanwhile: #908

[lemeurherve]

In general, I'd like an opportunity to review PRs in this repo unless it concerns purely the infra distribution site, or is urgent.

@daniel-beck can you review either #908 or #909 to restore update_center jobs on trusted.ci.jenkins.io please?

[daniel-beck]

I guess #908 will do until I've had an opportunity to review the other.