Add AnchorJS to aid with linking to page fragments

After trying to manually create a link to a page section for the nth time, I finally scratched that itch and added AnchorJS to provide the links for us. This greatly simplifies the process for linking to sections of pages, especially useful for those not versed in digging around in the page source.

Signed-off-by: default avatarMartyn Welch martyn.welch@collabora.com

content/architecture/long-term-reproducibility.md

@@ -261,9 +261,9 @@ version shipped in the Apertis repositories.
 ## Main artefacts and metadata
 
 The purpose of the previously described software items is to generate a set of
-artefacts, such as those described in [the v2019 release artefacts
-document]( {{< ref "release-v2019-artifacts.md" >}} ). With the artefacts themselves a few metadata
-entries are generated to help tracking what has been used during the build.
+artefacts, such as those described on the [images]( {{< ref "images.md" >}} )
+page. With the artefacts themselves a few metadata entries are generated to
+help tracking what has been used during the build.
 
 In particular, the `pkglist` files capture the full list of packages installed
 on each artefacts along their version. The `filelist` files instead provide