Spawn a background process from grunt

gistfile1.js

grunt.registerTask('spawn', 'Start app in the background', function () {
  var fs = require('fs'),
     spawn = require('child_process').spawn,
     out = fs.openSync('./out.log', 'a'),
     err = fs.openSync('./out.log', 'a'),
     env = process.env;

  env.NODE_ENV = 'testing';
  env.PORT = 7002;

  grunt.log.writeln('Starting app in the background');
  grunt.log.writeln('stdout and stderr will be logged to out.log');

  var child = spawn('node', ['../src/server.js'], {
   detached: true,
   stdio: [ 'ignore', out, err ],
   env: env
  });

  child.unref();
});