gulpfile.js

//npm install browser-sync gulp --save-dev
var gulp = require("gulp");
var less = require('gulp-less');
var path = require('path');
var browserSync = require("browser-sync").create();

// Static Server + watching scss/html files
gulp.task('serve', ['less'], function() {

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

    gulp.watch("css/**/*.less", ['less']);
    gulp.watch("./*.html").on('change', browserSync.reload);
});

/**
 * Compile with gulp-less + source maps
 */
gulp.task('less', function () {

    return gulp.src('./css/**/*.less')
    .pipe(less({
      paths: [ path.join(__dirname, 'less', 'includes') ]
    }))
    .pipe(gulp.dest('./public/css'))
    .pipe(browserSync.stream({match: '**/*.css'}));
});

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