Timetagger

A typical bug-fix release:

* Fix nonroot image being 'latest' - https://github.com/almarklein/timetagger/pull/397
* Fix Report: show-hours in decimals - https://github.com/almarklein/timetagger/pull/398
* Fix report: grouping by time - https://github.com/almarklein/timetagger/pull/399
* Tweak when startup tips are shown - https://github.com/almarklein/timetagger/pull/400

Changes to the app:
* Add button to show guide inside the app by almarklein in https://github.com/almarklein/timetagger/pull/393
* Better in-app tips for fresh users by almarklein in https://github.com/almarklein/timetagger/pull/394
* No tooltips on mobile devices by almarklein in https://github.com/almarklein/timetagger/pull/395

For the self-hosters:
* Switch containers to unpriviliged service user by danielhass in https://github.com/almarklein/timetagger/pull/357
* Update page to create credentials by almarklein in https://github.com/almarklein/timetagger/pull/391

* Fix sorting search results - https://github.com/almarklein/timetagger/pull/388
* Improvements to report grouping - https://github.com/almarklein/timetagger/pull/389

* Snap to today when resuming from a record earlier than today - https://github.com/almarklein/timetagger/pull/377
* In the search dialog you can now go to the date of each search result - https://github.com/almarklein/timetagger/pull/378 and https://github.com/almarklein/timetagger/pull/382
* Enable representing long durations as e.g. 1d3h20m - https://github.com/almarklein/timetagger/pull/379
* Enable showing today as 12h range - https://github.com/almarklein/timetagger/pull/380

* Clicking the sync button now shows the error (if there is one) - https://github.com/almarklein/timetagger/pull/373
* Implement a read-only mode (for when the trial has expired) - https://github.com/almarklein/timetagger/pull/374
* Add docker image for arm64 - https://github.com/almarklein/timetagger/pull/365
* Fix and improve display of durations - https://github.com/almarklein/timetagger/pull/376

* Fix that using uppercase chars in the search field breaks the search - https://github.com/almarklein/timetagger/pull/352
* Improvements to datetime input dialog - https://github.com/almarklein/timetagger/pull/353
* Add a space before 0h to avoid mental concat with the date that preceeds it - https://github.com/almarklein/timetagger/pull/354