Documentation: Clean up Docker installation docs (#76164)
* docs: fix minor inaccuracies
- give content on the type of data that needs persistence
- Use more precise terminology
- persistent storage != Docker volumes
- filesystem changes remains in a stopped container
and only discard when container removed
- 'directory' is more accurate than 'folder'
- fix typo: `grafana_data` should be `grafana-storage`
* docs: fix grammar and use 'directory' consistently
* docs: replace 'sqlite3' with 'SQLite version 3'
(cherry picked from commit 67656ebd06)
Co-authored-by: Daniel Li <dan@danyll.com>
grafana-delivery-bot[bot]
e0bcceaae2