Improve onboarding
- [ ] doc
  - [ ] readme
  - [ ] install
  - [ ] contributing
- [ ] dev environment
  - [x] vscode workspace
  - [ ] github codespace - see #373
- [ ] build:
  - [ ] locally
  - [ ] CI
- [ ] run/deploy:
  - [ ] locally during development
  - [ ] with docker
  - [ ] with kubernetes

Improve onboarding: - [ ] doc
  - [ ] readme
  - [ ] install
  - [ ] contributing
- [ ] dev environment
  - [x] vscode workspace
  - [ ] github codespace - see #373
- [ ] build:
  - [ ] locally
  - [ ] CI
- [ ] run/deploy:
  - [ ] locally during development
  - [ ] with docker
  - [ ] with kubernetes
