[bug] npm run using default node user instead of root

[robertsLando]

Environment

• Platform: Linux 7f44813ba8d7 5.13.0-35-generic 40~20.04.1-Ubuntu SMP Mon Mar 7 09:18:32 UTC 2022 x86_64 GNU/Linux
• Docker Version: 20.10.13
• Node.js Version: 16.13.2
• Image Tag: node:16.13.2-buster

Expected Behavior

When container is run with user: 0:0 (root) the function process.getuid() should return 0

Current Behavior

If we have a script like "test": "node -p \"process.getuid()\"" defined in package.json when we run it with npm run test it should output 0 but it prints 1000 instead (node user). If we lunch the same command without using npm run the output is correct:

root@7f44813ba8d7:/app# node -p "process.getuid()"
0
root@7f44813ba8d7:/app# npm run test

> @app/[email protected] test
> node -p "process.getuid()"

1000
root@7f44813ba8d7:/app# node -v
v16.13.2

Possible Solution

I tried to use

npm config set user 0
npm config set unsafe-perm true

and other workaround without any success

Steps to Reproduce

Described above

[robertsLando]

Moved to npm: npm/cli#4589