Basic Gulp Setup

Gulpfile.js

var gulp = require('gulp'),
	nodemon = require('gulp-nodemon'),
	sass = require('gulp-sass'),
	sourcemaps = require('gulp-sourcemaps'),
	gutil = require('gulp-util'),
	livereload = require('gulp-livereload'),
	uglify = require('gulp-uglify'),
	concat = require('gulp-concat'),
	ngAnnotate = require('gulp-ng-annotate'),
  size = require('gulp-size');

gulp.task('sass', function () {
    gulp.src('./public/sass/style.scss')
        .pipe(sourcemaps.init())
        .pipe(sass({outputStyle: 'compressed'}))
        .pipe(sourcemaps.write())
        .pipe(size())
        .pipe(gulp.dest('./public/css'))
        .pipe(livereload());
});

gulp.task('js:vendor', function(callback) {
  return gulp.src([
      './public/bower_components/angular/angular.min.js'
    ])
    .pipe(sourcemaps.init())
    .pipe(concat('vendor.js'))
    .pipe(uglify())
    .pipe(size({showFiles: true}))
    .pipe(gulp.dest('./public/js/dist'));
});

gulp.task('js', function () {
  gulp.src([
  	'./public/js/app.js',
  	'./public/js/components/**/*.js',
  	'./public/js/shared/**/*.js',
  	])
    .pipe(sourcemaps.init())
      .pipe(concat('app.js'))
      .pipe(ngAnnotate())
      //.pipe(uglify())
    .pipe(sourcemaps.write('./'))
    .pipe(size({showFiles: true}))
    .pipe(gulp.dest('./public/js/dist'));
});

gulp.task('watch', function(){
	livereload.listen(35727);
	gulp.watch('./public/sass/**/*.scss', ['sass']);
    gulp.watch('./public/js/**/*.js', ['js']);
	
	nodemon({
		ext: 'html js ejs scss'
	});
});

gulp.task('default', ['sass','js', 'watch']);

package.json

{
  "name": "app",
  "version": "0.1.0",
  "description": "",
  "scripts": {
    "start": "node ./bin/www"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "gulp": "^3.8.11",
    "gulp-concat": "^2.5.2",
    "gulp-livereload": "^3.8.0",
    "gulp-ng-annotate": "^0.5.2",
    "gulp-nodemon": "^2.0.2",
    "gulp-sass": "^1.3.3",
    "gulp-size": "^1.2.1",
    "gulp-sourcemaps": "^1.5.1",
    "gulp-uglify": "^1.2.0",
    "gulp-util": "^3.0.4"
  },
  "dependencies": {
    "body-parser": "~1.12.0",
    "compression": "^1.4.3",
    "cookie-parser": "~1.3.4",
    "debug": "~2.1.1",
    "ejs": "~2.3.1",
    "express": "~4.12.2",
    "lodash": "^3.6.0",
    "moment": "^2.10.3",
    "mongoose": "3.8",
    "morgan": "~1.5.1",
    "serve-favicon": "~2.2.0"
  }
}