Add lxd group creation to installation process

[hamistao]

@ru-fu added lxd group creation information as discussed.

[github-actions]

Heads up @ru-fu - the "Documentation" label was applied to this issue.

[ru-fu]

Thanks, this looks good!
Some small suggestions.

[ru-fu]

Thank you! 🚀

[tomponline]

@hamistao are you able to make the changes suggested by @simondeziel ?

[tomponline]

@ru-fu should we also include the group instructions in https://documentation.ubuntu.com/lxd/en/latest/tutorial/first_steps/ as we've had a new user follow this who was presumably not on Ubuntu and so got a bit stuck, see https://discourse.ubuntu.com/t/lxd-5-21-1-lts-has-been-released/43823/79

[ru-fu]

@ru-fu should we also include the group instructions in https://documentation.ubuntu.com/lxd/en/latest/tutorial/first_steps/ as

Yes, that makes sense! Should be a new 3rd step in the install section - can you add that @hamistao ?

we've had a new user follow this who was presumably not on Ubuntu and so got a bit stuck, see https://discourse.ubuntu.com/t/lxd-5-21-1-lts-has-been-released/43823/79

Unrelated comment - for lxd init, we're saying this can be run without sudo for simple configurations:
https://documentation.ubuntu.com/lxd/en/latest/howto/initialize/
Has that changed?

[tomponline]

Unrelated comment - for lxd init, we're saying this can be run without sudo for simple configurations:
https://documentation.ubuntu.com/lxd/en/latest/howto/initialize/
Has that changed?

Its probably still fine as long as user is in lxd group.

[hamistao]

@ru-fu Yes, of course! I will be pushing the chages soon.

[hamistao]

@ru-fu @simondeziel @tomponline I have made all requested changes. In the first steps section I only added a command to add the current user to the lxd group since the group itself is created during snap installation (step 2 in the stallation process).

[simondeziel]

Thanks

[ru-fu]

Thank you! 🚀