Jenkins - permission issues notice

[ttodua]

Seems it's a known problem (many threads across internet), when you might face this problem:

"Internal Error: EACCES: permission denied, symlink '../lib/node_modules/corepack/dist/pnpm.js' -> '/usr/local/bin/pnpm'"

so, additional note would help users, at least it solved in my case and could help others too:

however, I am leaving this to your judgement, maybe you can also add some notes of possible side-effects of using root there

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