Move JavaScript and sass processing out of gulp, and into Hugo pipes

[mattstratton]

This should be relatively simple and will make it much easier to make changes to stylesheets etc.

Biggest thing to watch is if it has any impact on build times.

[mattstratton]

ok, did a little more looking; this will require eveyone to have Dart Sass installed just to build the site. That seems like...not something we are okay with.

[mattstratton]

as it happens, this isn't as big a deal to do as I thought, so re-opening it as I work on it!

[mattstratton]

I have some work on it here - https://github.com/devopsdays/devopsdays-web/tree/mattstratton/pipes

GitHub

GitHub - devopsdays/devopsdays-web at mattstratton/pipes

This is the website for devopsdays. Contribute to devopsdays/devopsdays-web development by creating an account on GitHub.

[mattstratton]

I've update the netlify plugin config to actually work now, so the netlify builds work fine with dart sass now!

[toshywoshy]

I have taking a first set and activated minification in PR #14592 as this is quite simple to do, and we have image pipeing also in PR #14341 .
It would seem that CSS/SCSS/SASS and then JS pipeing would be next to do.