Thanks for the additional information. And, I’m not saying, that you suggested that I should use v2. 
But as you suggested, I was reading and using the getting started guide where InfluxDB v2 is suggested, which I ended up with:
curl -sL -l -v localhost:8086/ping
* Trying 127.0.0.1:8086...
* Connected to localhost (127.0.0.1) port 8086 (#0)
> GET /ping HTTP/1.1
> Host: localhost:8086
> User-Agent: curl/7.88.1
> Accept: */*
>
< HTTP/1.1 204 No Content
< Vary: Accept-Encoding
< X-Influxdb-Build: OSS
< X-Influxdb-Version: v2.7.12
< Date: Sun, 22 Jun 2025 07:48:26 GMT
<
* Connection #0 to host localhost left intact
So, should we then change the docker compose file and the getting started guide to explicitly use InfluxDB v1? Or should we add a note/warning to the getting started, that using docker is only intended for development (because currently, there is none and the reply in the forum also didn’t read like it)?