The hatchery can be found at hatchery.badge.team and is a repository of apps for use on your badge.
For the MCH2022 badge a separate hatchery was created which can be found at mch2022.badge.team. The two hatcheries will eventually be merged into one.
Registration
Registration is simple, email can be whatever, for example test@test.com, it is only used for password resets.
App model
Apps are folders with as a minimal requirement a __init__.py file.
Hatchery will add an empty version of that file for you.
The badges get some extra information about your app by reading a file named metadata.json. Unless you upload or create such a file, Hatchery will generate one.
This contains at-minimum the description of the app and weather or not it should be shown in the launcher.
{
"name": "example",
"description": "My awesome example app",
"category": "hacking",
"author": "Henk de Vries",
"revision": 1
}