This allows not enabling Dashboard and Files. It also sorts the apps in the menu according to the order in the `config.core.enabledApps` array.
Since this will require a major version upgrade (`v3.0.0`), I also took the opportunity to upgrade PostgreSQL. You can [follow this guide on how to upgrade PostgreSQL on Docker containers](https://news.onbrn.com/step-by-step-guide-upgrading-postgresql-docker-containers/).
Finally, this has some minor security improvements (confirming API endpoints won't work if their app is disabled in the config).
Closes#114Closes#108
This refactors the data handlers into a more standard/understood model-like architecture, to prepare for a new, more robust config system.
It also fixes a problem with creating new Notes and uploading new Photos via the web interface (related to #58).
Finally, it speeds up docker builds by sending in less files, which aren't necessary or will be built anyway.
This is all in preparation to allow building #13 more robustly.
