happa release v1.7.2

What’s changed

• Updated the development documentation in README (#2420)

Developer changes / New feature preparation

• Much refactoring and removal of sass towards css-in-js and typescript (#2383, #2409, #2410, #2411, #2412, #2349)
• Enabling more existing features using the Management API (MAPI) (#2413, #2416, #2421, #2425)
• Faster pre commit hook (#2422)
• Set nodeJS version to v14 (#2423)
• Update nginx to 1.19-alpine (#2426)
• Various other dependency updates