Today I learned that nginx requires a special invocation to listen to
IPv6 addresses as well as IPv4. On some of my other projects, this was
causing Let's Encrypt certificate renewal to fail, because Let's
Encrypt prefers to connect over IPv6 when an AAAA record is present, so
its challenges were always returning 404, because nginx wasn't
listening on IPv6.
This shouldn't be affecting impress in production, because we don't
have an AAAA record right now. But I'm just making this change in all
my projects, to make sure this doesn't bite me in the future!
Rails already creates little pre-gzipped `.gz` copies of all our assets
in the `public/assets` directory when we build. This configures nginx to
send those when available!
We weren't doing *any* gzip stuff before, so this helps a lot with those
bigger JS files, like the `wardrobe-2020` stuff. It's now at ~.5MB with
compression, which is still a bit big, but nowhere near as offensive as
the 4.5MB pre-anything, or 1.5MB post-minification, lol.
