pm2 does not work with bat file on Windows

What's going wrong?

starting pm2 with a .bat file raised an error

What do you expect?

I expect pm2 to work with Windows scripts (.bat, .cmd, .ps files) and documentation updated accordingly, or a more clear documentation about restrictions (if any) on Windows.
All samples, or code snippets in the documentation is about .sh scripts (so with Linux).

Environment

• Windows 10
• NodeJS: v14.17.1
• NPM: v6.14.13
• pm2: v5.1.2

How could we reproduce this issue?

test-pm2.bat:

@timeout /t 30

then try: pm2 start test-pm2.bat

Supporting information

pm2 error log file:

@timeout /t 30
^

SyntaxError: Invalid or unexpected token
    at wrapSafe (internal/modules/cjs/loader.js:1001:16)
    at Module._compile (internal/modules/cjs/loader.js:1049:27)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
    at Module.load (internal/modules/cjs/loader.js:950:32)
    at Function.Module._load (internal/modules/cjs/loader.js:790:14)
    at Object.<anonymous> (C:\Tools\node\node-v14.17.1-win-x64\node_modules\pm2\lib\ProcessContainerFork.js:33:23)
    at Module._compile (internal/modules/cjs/loader.js:1085:14)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
    at Module.load (internal/modules/cjs/loader.js:950:32)
    at Function.Module._load (internal/modules/cjs/loader.js:790:14)

Reproduce the issue on Windows with the provided test-pm2.bat and pm2 start test-pm2.bat. Start at lib/ProcessContainerFork.js, named in the stack trace, and trace how script files are launched. Done means Windows batch scripts work as requested, or the relevant documentation clearly describes supported scripts and restrictions.