23.js

var gulp = require('gulp');
var server = require('gulp-server-livereload');

gulp.task('copy-html', function() {
  return gulp // note "return" keyword
    .src('./src/**/*.html') // copy everything, including subdirectories
    .pipe(gulp.dest('dist')); // to dist folder
});

gulp.task('server', ['copy-html'], function() {
  gulp
  .src('./dist') // everything from ./dist directory
  .pipe(server({ // pipe to server object
    livereload: true, // reload when files are changed
    open: true // and open the browser
  }));
});