chore: remove obsolete version attribute from docker-compose.yaml

[VewDev]

Remove the version attribute, which has been obsolete since Compose v2, in 2020 and throws a warning each time you start the containers.

From the official docker documentation (source):

Compose v2, announced in 2020, is written in Go and is invoked with docker compose. Unlike v1, Compose v2 ignores the version top-level element in the compose.yaml file and relies entirely on the Compose Specification to interpret the file.