Upgrade to Jekyll 4

What's Changed

• Slack by @MichaelCurrin in #9
• fix Jekyll Docker links by @MichaelCurrin in #10
• build: upgrade Jekyll to 4 by @MichaelCurrin in #11

Full Changelog: v3.3.0...v4.0.0

Move and rename sections and move content to dev-cheatsheets

v3.2.0

Move and rename and move content to dev-cheatsheets

Use custom theme

Move templating and logos to be handled by a custom theme. The repo is much lighter now.

See https://github.com/MichaelCurrin/minima/

Convert to Jekyll static site

v2.0.0

v2.0.0

First major release

The content has been detailed and varied for a long time and it's time to make this officially ready.