Super Simple Gulp Starter + Static Server.

gulp_file.js

var gulp = require('gulp');
var plumber = require('gulp-plumber');
var rename = require('gulp-rename');
var autoprefixer = require('gulp-autoprefixer');
var concat = require('gulp-concat');
var jshint = require('gulp-jshint');
var uglify = require('gulp-uglify');
var imagemin = require('gulp-imagemin');
var cache = require('gulp-cache');
var minifycss = require('gulp-minify-css');
var sass = require('gulp-sass');
var browserSync = require('browser-sync');
var mainBowerFiles = require('gulp-main-bower-files');

gulp.task('browser-sync', function() {
  browserSync({
    server: {
       baseDir: "./"
    }
  });
});

gulp.task('bs-reload', function () {
  browserSync.reload();
});

gulp.task('images', function(){
  gulp.src('assets/src/images/**/*')
    .pipe(cache(imagemin({ optimizationLevel: 3, progressive: true, interlaced: true })))
    .pipe(gulp.dest('assets/dist/images/'));
});

gulp.task('styles', function(){
  gulp.src(['assets/src/styles/**/*.scss'])
    .pipe(plumber({
      errorHandler: function (error) {
        console.log(error.message);
        this.emit('end');
    }}))
    .pipe(sass({includePaths: ['./node_modules']}))
    .pipe(autoprefixer('last 2 versions'))
    .pipe(gulp.dest('assets/dist/styles/'))
    .pipe(rename({suffix: '.min'}))
    .pipe(minifycss())
    .pipe(gulp.dest('assets/dist/styles/'))
    .pipe(browserSync.reload({stream:true}))
});

gulp.task('scripts', function(){
  return gulp.src('assets/src/scripts/**/*.js')
    .pipe(plumber({
      errorHandler: function (error) {
        console.log(error.message);
        this.emit('end');
    }}))
    .pipe(jshint())
    .pipe(jshint.reporter('default'))
    .pipe(concat('main.js'))
    .pipe(gulp.dest('assets/dist/scripts/'))
    .pipe(rename({suffix: '.min'}))
    .pipe(uglify())
    .pipe(gulp.dest('assets/dist/scripts/'))
    .pipe(browserSync.reload({stream:true}))
});

gulp.task('copy:bower', function() {
  return gulp.src('./bower.json')
    .pipe(mainBowerFiles())
    .pipe(gulp.dest('./assets/dist/scripts/vendors/'));

});

gulp.task('copy:videos', function() {
  return gulp.src('./assets/src/videos/**/*')
    .pipe(gulp.dest('./assets/dist/videos/'));
});

gulp.task('copy:fonts', function() {
  return gulp.src('./assets/src/fonts/**/*')
    .pipe(gulp.dest('./assets/dist/fonts/'));
});

gulp.task('default', ['browser-sync'], function(){
  gulp.watch("assets/src/styles/**/*.scss", ['styles']);
  gulp.watch("assets/src/scripts/**/*.js", ['scripts']);
  gulp.watch("./bower_components/**/*", ['copy:bower']);
  gulp.watch("./assets/src/videos/**/*", ['copy:videos']);
  gulp.watch("./assets/src/fonts/**/*", ['copy:fonts']);
  gulp.watch("*.html", ['bs-reload']);
});