gulpfile.js

var gulp = require('gulp'),
    LiveServer = require('gulp-live-server'),
    browserSync = require('browser-sync'),
    browserify = require('browserify'),
    source = require('vinyl-source-stream'),
    reactify = require('reactify');

gulp.task('live-server', function(){
   var server = new LiveServer('server/main.js');
   server.start();
});

gulp.task('bundle',['copy'],function(){
    return browserify({
        entries:'app/main.jsx',
        debug:true
    })
        .transform(reactify)
        .bundle()
        .pipe(source('app.js'))
        .pipe(gulp.dest('./.tmp'));
});
gulp.task('copy',function(){
    gulp.src(['app/*.css'])
        .pipe(gulp.dest('./.tmp'));
});
gulp.task('serve',['bundle','live-server'],function(){
   browserSync.init(null,{
       proxy:"http://localhost:7777",
       port: 9001
   });
});