setup.sh - not create user vaultwarden if not exist

[laweschan]

Describe the bug
As Title

To Reproduce
Steps to reproduce the behavior:
git clone https://github.com/vpolaris/Podman-Bitwarden.git
cd Podman-Bitwarden
chmod u+x setup.sh; sudo ./setup.sh

Expected behavior
script will auto create user if not exists

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: Fedora
• Browser [e.g. chrome, safari]
• Version 34

Additional context
add command "groupadd docker" before this line:
useradd -m -u 10502 -G docker --shell /bin/bash --comment "Vaultwarden RS User Container" --user-group vaultwarden

then it should able to continues

[vpolaris]

I adding a test to check docker group and create it if missing,

if [[ "$(getent group docker)"!="" ]];then 
    printf "group docker exists\n"
else
    groupadd docker
fi

thank you for your support