DARK MODE!!!!!
cough cough Yeah, what I mean is... We need dark mode. As default for the best.

Actually we can create theme files, idk maybe here: src/configs/themes/dark.json which has this content:

{
    "meta": {
        "name": "Dark theme",
        "description": "Your eyes will thank you. Modern, simplic and dark.",
        "version": "1.0.0",
        "author": "DocSort team",
        "category": "black"
    },
    "theme": {
        "background": "#1c1c1c",
        "text": "#ffffff",
        "ok_button": "#???????",
        ...
    }
}

The themes would be in the database too, but we can erase the themes from the db at each start and load them from a json-file.

This article, received today, is exactly about this topic^^
Not saying that we must follow it, it's just interesting to read :)
https://medium.freecodecamp.org/how-to-create-themes-for-your-angular-7-apps-using-css-variables-69251690e9c5