Add basic meta-data implementation - must include canonical URL

There are some things that we can do to implement interesting/useful metadata into this application for things like sharing on Twitter, Slack posting etc which we may get "for free" as soon as we look at the metadata 😂

The only **requirement** for this issue to be considered complete is to have *every* page point to the corresponding `/release/` URL in the canonical metadata. This will greatly improve the SEO for the guides 💪