My gulpfile.js

gulpfile.js

// Config
var config = {
	css: {
		src: './src/css/*.scss',
		bin: './bin/css/'
	},
	js: {
		src: './src/js/*.js',
		bin: './bin/js/'
	},
	img: {
		src: './src/img/*.{png,jpg,jpeg,gif,svg}',
		bin: './bin/img/'
	}
};
// ----------

var gulp =           require('gulp');
var concat =         require('gulp-concat');
var sass =           require('gulp-sass');
var autoPrefixer =   require('gulp-autoprefixer');
var minifyCss =      require('gulp-minify-css');
var jshint =         require('gulp-jshint');
var uglify =         require('gulp-uglify');
var imagemin =       require('gulp-imagemin');

/* --------------------------------------
    SASS
-------------------------------------- */
gulp.task('css', function() 
{
	return gulp.src(config.css.src)
		.pipe(sass())
		.pipe(concat('styles.min.css'))
		.pipe(autoPrefixer())
		.pipe(minifyCss())
		.pipe(gulp.dest(config.css.bin));
});

/* --------------------------------------
    JS
-------------------------------------- */
gulp.task('js', function() 
{
	return gulp.src(config.js.src)
		.pipe(jshint())
		.pipe(jshint.reporter('default'))
		.pipe(concat('scripts.min.js'))
		.pipe(uglify())
		.pipe(gulp.dest(config.js.bin));
});


/* --------------------------------------
    JS
-------------------------------------- */
gulp.task('img', function () {
	return gulp.src(config.img.src)
		.pipe(imagemin())
		.pipe(gulp.dest(config.img.bin));
});

/* --------------------------------------
    Watch
-------------------------------------- */
gulp.task('watch', function() 
{
	gulp.watch(config.css.src, ['css']);
	gulp.watch(config.js.src, ['js']);
	gulp.watch(config.img.src, ['img']);
});
gulp.task('default', ['watch']);