It's an API to serch for places in Germany.
You can search by

• zipcode (Postleitzahl)
• ags (Amtlicher Gemeindeschlüssel)
• osm_id (Openstreetmap ID)

[
    {
    "osm_id": "2186917",
    "ags": "09187124",
    "ort": "Edling",
    "plz": "83533",
    "landkreis": "Landkreis Rosenheim",
    "bundesland": "Bayern"
    }
]

You need to build this docker image before:
https://github.com/vgarcia007/webapp-baseimage

Then run docker compose in this repo.
You might edit the compose file...

docker-compose up -d

At last step run the setup
https://localhost:5013/setup

Thats it
For available routes see index.php (Yes i am very lazy).

Yes, the places data is from:
https://www.suche-postleitzahl.org/
https://www.openstreetmap.org/copyright

And AltoRouter is used for routing in the script: https://github.com/dannyvankooten/AltoRouter