gulpfile.js

const gulp = require('gulp');
const browserSync = require('browser-sync').create();
const sass = require('gulp-sass');

// Compile Sass & Inject into browser
gulp.task('sass', function(){
  return gulp.src(['node_modules/bootstrap/scss/bootstrap.scss', 'src/scss/*.scss'])
    .pipe(sass())
    .pipe(gulp.dest("src/css"))
    .pipe(browserSync.stream());
})

// Move Js files to our src/js
gulp.task('js', function(){
  return gulp.src(['node_modules/bootstrap/dist/js/bootstrap.min.js', 'node_modules/jquery/dist/jquery.min.js', 'node_modules/popper.js/dist/umd/popper.min.js'])
    .pipe(gulp.dest("src/js"))
    .pipe(browserSync.stream());
})

//Watch Sass & Server
gulp.task('serve', ['sass'], function(){
  browserSync.init({
    server: "./src"
  });

  gulp.watch(['node_modules/bootstrap/scss/bootstrap.scss', 'src/scss/*.scss'], ['sass']);
  gulp.watch("src/*.html").on('change', browserSync.reload);
})

// Move Fonts folder to src
gulp.task('fonts', function(){
  return gulp.src('node_modules/font-awesome/fonts/*')
    .pipe(gulp.dest("src/fonts"));
})

//Move Font Awesome css to src
gulp.task('fa', function(){
  return gulp.src('node_modules/font-awesome/css/font-awesome.min.css')
    .pipe(gulp.dest("src/css"));
})

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