Stylelint is a css linter: https://stylelint.io/
As part of this change we have added two javascript scripts:
```
pnpm lint:css
pnpm lint:css:fix
```
Look at `.vscode/settings.json.sample` and `.vscode/extensions.json` for
configuration in VSCode.
---------
Co-authored-by: Joffrey JAFFEUX <j.jaffeux@gmail.com>
- Uses a more appropriate image, with immutable tag (so update prompts work correctly)
- Updates port forwarding
- Improves mount setup (inc. persistant PG/Redis when rebuilding)
- Fixes ember-cli live reload
- Automatically configures VSCode & extensions
- Update extension recommendations and move under `.vscode/extensions.json`
- Update sample tasks/settings, and move under `.vscode/settings.json.sample` and `.vscode/tasks.json.sample`
`.vscode/settings.json` and `.vscode/tasks.json` remain gitignored, so will not be overwritten by this commit
