[Bug]: install.sh does not work as expected on freebsd

[unknowndevQwQ]

Is there an existing issue for this?

• I have searched the existing issues

OS/Web Information

• Web Browser: N/A
• Local OS: N/A
• Remote OS: freebsd
• Remote Architecture: x86_64
• code-server --version: Not yet installed

Steps to Reproduce

1. Run install.sh as a normal user

Expected

It should be installed successfully or something

Actual

$ ./install.sh 
FreeBSD 13.1-RELEASE-p2
Installing latest from npm.

./install.sh: NPM_PATH: not found
Installing with npm.

+ su - -c 'npm install -g code-server --unsafe-perm'
Password:
su: only root may use -c

Logs

No response

Screenshot/Video

No response

Does this issue happen in VS Code or GitHub Codespaces?

• I cannot reproduce this in VS Code.
• I cannot reproduce this in GitHub Codespaces.

Notes

No response

[unknowndevQwQ]

At the same time, I noticed that install.sh does not try the doas command, which is a sudo-like command

[jsjoeio]

@code-asher - figured you might be better to answer this.