phpengine/build.js

var compressor = require('node-minify');

compressor.minify({
    compressor: 'clean-css',
    input: [
      "node_modules/bootstrap/dist/css/bootstrap.min.css",
      "ui/omlink.css",
      "ui/custom.css"
    ],
    output: 'bundle.css'
  }
);

compressor.minify({
    compressor: 'uglifyjs',
    input: [
      "ui/omlink.js",
      "ui/custom.js"
    ],
    output: 'ui/bundle.min.js'
  }
);

compressor.minify({
    compressor: 'no-compress',
    input: [
      "node_modules/jquery/dist/jquery.min.js",
      "node_modules/bootstrap/dist/js/bootstrap.bundle.min.js",
      "ui/bundle.min.js"
    ],
    output: 'bundle.js'
  }
);