Concat all modules first in Angular

task.js

var paths = {
  src: [
    'src/scripts/app/**/*module*.js',
    'src/scripts/app/**/*.js'
  ],
  dest: 'app/assets/scripts'
};
 
 
gulp.task('scripts', function () {
  return gulp.src(paths.src)
    .pipe(concat('app.js'))
    .pipe(gulp.dest(paths.dest));
});