Add node-red user to dailout group

Add node-red user to dailout group by default instead of node-red group.

From Debian Wiki:

dialout: Full and direct access to serial ports. Members of this group can reconfigure the modem, dial anywhere, etc.

In current images, node-red user has it's own group node-red, which has no permissions to serial. To gain permission to serial, one needs to add --user node-red:dailout to the docker run command or equivalent in docker compose file.

We might want to add node-red user to the dailout group, so that above is no longer required and node-red has permission to serial by default.

However, current users might get permission issues with the persistent dir, because of current group.

Do all architectures have dailout group available?
[ √ ] amd64/alpine
[ √ ] arm32v6/alpine
[ √ ] arm32v7/alpine
[ √ ] arm64v8/alpine
[ √ ] i386/alpine
[ √ ] s390x/alpine

Proposal: create a feature branch for this change and do some tests.

Inizia esaminando la configurazione degli utenti e dei gruppi dell’immagine Docker per le architetture Alpine elencate. Verifica se il gruppo dialout è disponibile e testa l’accesso seriale con node-red, oltre ai permessi per le directory persistenti esistenti. Il lavoro è completato quando le immagini predefinite forniscono l’accesso seriale senza un override aggiuntivo di utente/gruppo, senza compromettere la proprietà dei dati persistenti.