This commit moves the site to use the official Jekyll SEO Tag
plugin (https://github.com/jekyll/jekyll-seo-tag) to generate the
search-engine meta in the HEAD of each page. The title and canonical
URL output should be largely the same as before, but with additional
metadata, such as JSON-LD (for richer indexing), Twitter card
metadat, etc.
Like the other plugins, this should largely work out-of-the-box,
with no additional day-to-day configuration, but is customizable
where desired.
Starting with Jekyll v3.3, Jekyll ships with `relative_url` and
`absolute_url` filters. Rather than manual concatenating strings,
we can rely on Jekyll to handle the logic in Ruby land, which
takes into account the site's URL (locally and in production), and
handles things like double "/"s.
The previous link now has scary language in a big font, along with a membership requirement. That page does _mention_ kubernetes-users but it does not link to said group. This fixes both of those problems.