How to configure borwser-syc, nsmarty and save output to html file?

Question

Node.js

Tell me how to do it?
Now set up like this

var gulp   = require('gulp'),
    sass   = require('gulp-ruby-sass'),
    notify = require("gulp-notify"),
    bower  = require('gulp-bower' ),
    browserSync = require('browser-sync').create(),
    nsmarty = require('nsmarty'),
    util = require('util');


var config = {
    sassPath: './resources/sass',
    bowerDir: './bower_components'
};

nsmarty.tpl_path = './resources/tpl';

var $arr = {
    title: 'Hi, I am nsmarty template engine!',

    books: [
        {
            title  : 'JavaScript: The Definitive Guide',
            author : 'David Flanagan',
            price  : '31.18'
        },
        {
            title  : 'Murach JavaScript and DOM Scripting',
            author : 'Ray Harris'
        },
        {
            title  : 'Head First JavaScript',
            author : 'Michael Morrison',
            price  : '29.54'
        }
    ]
};

gulp.task('serve', ['css'], function() {

    browserSync.init({
        server: "./public"
    });
    
    gulp.watch(config.sassPath + '/**/*.scss', ['css']);
    gulp.watch(config.bowerDir + '/bootstrap-sass-official/assets/stylesheets/**/*.scss', ['css']);
    gulp.watch("./resources/scss/*.scss", ['css']);
    gulp.watch("./resources/html/*.html",['html']);

});

gulp.task('bower', function() {
    return bower()
        .pipe(gulp.dest(config.bowerDir))
});

gulp.task('icons', function() {
    return gulp.src(config.bowerDir + '/fontawesome/fonts/**.*')
        .pipe(gulp.dest('./public/fonts'));
});

gulp.task('html', function () {
    gulp.src('./resources/html/*.html')
        .pipe(gulp.dest('./public'))
        .pipe(browserSync.stream());
});

gulp.task('css', function () {
    return sass(config.sassPath + '/style.scss', {
        style: 'expanded',
        loadPath: [
            './resources/sass',
            config.bowerDir + '/bootstrap-sass-official/assets/stylesheets',
            config.bowerDir + '/fontawesome/scss'
        ]
    }).on("error", notify.onError(function (error) {
        return "Error: " + error.message;
    }))
        .pipe(gulp.dest('./public/css'))
        .pipe(browserSync.stream());
});

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