bug: when docker is not configured using rootless, envd bootstrap with permission denied

[whybeyoung]

Description

when docker is not configured using rootless, envd bootstrap with permission denied

Reproduction

docker installed by default without any additional configurings.

Additional Info

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[whybeyoung]

Maybe we should add some docs in this repo for envd beginners.

[gaocegege]

Sure, thanks for the issue.

[aseaday]

I think we could add a note in the bootstrap process such as:

Warning: Please keep that $USER could access the docker socket and see https://docs.docker.com/engine/install/linux-postinstall/ for more info.

Assign to me if it is ok.

[gaocegege]

Thanks for the contribution!

@aseaday You can use the command /assign to assign the issue to yourself. Like this

/assign @aseaday

[whybeyoung]

lgtm