root: CI/CD optimisation

Tasks

• move typecheck task to a different job
• optimise yarn install cache, so only used .zip packages are cached
• only install --production packages for build
• use --concurrency=100% instead of arbritary number
• only build websites that were modified
• only deploy websites that were modified
• use a single deploy job for production (jobs are executed by the same runner, so not really important to make them a single job)

Optimisations

1. Original 17m26s
   • build 17m04s
2. First 7m21s
   • typecheck 6m04s
   • build 7m10s
3. Cached 6m25s
   • typecheck 5m57s
   • build 6m13s
4. Pre-process 7m50s
   • typecheck 5m58s
   • generate 3m29s
   • build 4m03s
5. Single change 6m08s
   • typecheck 5m55s
   • generate 3m21s
   • build 1m35s (competition)
6. Docker turbo 6m44s
   • typecheck 6m44s
   • generate 2m05s
   • build 2m14s (storybook)

New rules

Dependencies (packages, libraries, etc) used at compile/build MUST be installed as production dependencies. ESLint, prettier, and any other development-related depedencie should be installed as devDependencie. This way, the pipeline installs less packages and is faster.