Not able to run child process in node kafka consumer

Question

const { spawn } = require('child_process');
const child = spawn('dir', ['./kafka'], { shell: true });
child.stdout.on('data', (data) => {
  console.log("child process started");
});
child.stderr.on('data', (data) => {
  console.error("failed to start child process");
});

child.on('close', (code) => {
  console.log(`child process exited with code ${code}`);
});

Used above code to execute kafka consumer in a separate child process which is located in kafka folder with name consumer.js.

Getting this error

failed to start child process
child process exited with code 127