Minor bug in setup.sh on docker group test if docker is the FIRST group returned by "id -Gn"

[hulkster]

Problem
If docker is the first group returned via "id -Gn", setup.sh says "WARNING: You do not appear to be in the docker group"

The issue is with from line 39 of 4.3.1 setup.sh that does the following test:
if ! $(id -Gn 2>/dev/null | grep -qE " docker( |$)"); then
A possible fix it to also use "^docker" so the expression returns true if docker is the first (or only) group listed. But I don't know the full reasoning for the regex, so someone should make sure whatever fix is done is "correct" ... since regex can be "maze of twisty little passages" ;-)

To Reproduce
$ id -Gn
docker
$ ./setup.sh
Powerwall Dashboard (v4.3.1) - SETUP

WARNING: You do not appear to be in the docker group.

Please ensure your local user is in the docker group and run without sudo.
sudo usermod -aG docker $USER
./setup.sh

Screenshots
N/A

Host System
AlmaLinux release 9.4

Additional context
The reason I stumbled across this bug is because I have a captive account (named solar!) that only runs powerwall ... so I listed the group ID for docker in the /etc/passwd entry for solar. Note the problem ALSO occurs if the user belongs to multiple groups, but docker is the first one returned by id -Gn

So yea, I could make the "primary" group something else and then add solar to the /etc/group docker entry ... but I don't think this should be necessary.

Note that setup.sh does allow you to proceed ... so it's not really a show-stopper ... but a bit confusing because I was like WTF, the user IS in the docker group! ;-)

[jasonacox]

Can you run this script to see what you get?

if id -Gn 2>/dev/null | grep -qw "docker"; then
   echo "good"
else
   echo "bad"
fi

[hulkster]

I tested using various "group settings" and substrings and that works great @jasonacox.

My situation was a real corner case ... but I think using "-w" for the regex is the way to go.

You can close out this bug report when pushed into production.