This puts the version comment stuff earlier in the file, so it's more
noticeable, and keeps the OpenGraph/Twitter card info near the other `meta`
tags.
Unfortunately, this does mean we need to copy in the original `meta` partial,
but it's only two lines.
Testing Done:
Checked rendered results and the meta tags were still there.
Reviewed at https://reviews.imfreedom.org/r/1929/
/**
* Runs after Hugo has built the site
* * Cleans, Minifies and Optimises hugo output
*
* USAGE: node tools/pre-prod [path to hugo output]