Extremely basic gulp dev file (proxy to backend server)

gulpfile.js

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

var options = {
  javascript:'client/public/src/**/*.js',
  styles:'client/public/src/assets/css/*.css',
  html:'client/public/src/**/*.html',
  host: 'localhost:8000'
};

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

  browserSync.init({
    proxy: HOST,
    notify: false
  });

  gulp.watch(options.javascript).on('change',browserSync.reload);
  gulp.watch(options.styles).on('change',browserSync.reload);
  gulp.watch(options.html).on('change',browserSync.reload);
});

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