Run ble2mqtt executable rootless inside the container

[stefan-golinschi]

Added rootless user in order to make zigbee2mqtt container compatible with podman setups. This makes it possible to pass dbus UID authentication by using the podman user uid/gid.

For now, the rootless user id / group id are hardcoded in the Dockerfile. A future improvement should be done here: dynamically adjusting the permissions using an env variable.

Also, running ble2mqtt as rootless user, improves security for docker users.

Please read this discussion about using bluetooth via dbus in a rootless container: 16772

[stefan-golinschi]

Also, I have tested this on

• rootful docker setup using docker compose
• rootless setup using podman

[devbis]

Thanks!