Starting Gulpfile with BrowserSync

gulpfile.js

var gulp        = require('gulp');
var browserSync = require('browser-sync').create();
var reload      = browserSync.reload;

gulp.task('serve', function () {

    browserSync.init({
        server: {
            baseDir: "./app"
        }
    });

    gulp.watch(["app/**/*.html", "app/**/*.js"]).on("change", browserSync.reload);
});

gulp.task('default', ['serve']);