gruntfile.js

module.exports = function (grunt) {

    grunt.initConfig({
      uglify: {
          options: {
              mangle: false,
              sourceMap: 'public/build/js/main.min.js.map'
          },
          target: {
              files: {
                  'public/build/js/main.js': ['public/js/*.js']
              }
          }
      },
      copy: {
        image: {
          files: [
            {
              expand: true,
              cwd: 'public/img',
              src: '**.*{png,jpg,svg}',
              dest: 'public/build/img/'
            }
          ]
        }
      },
      sass: {
          main: {
              options: {
                  compass: true
              },
              files: {
                  'public/build/css/style.css': 'public/css/style.sass'
              }
          }
      },
      watch: {
          options: {
              livereload: true,
          },
          sass: {
              files: ['public/css/**/*.sass'],
              tasks: ['sass'],
              options: {
                  //
              }
          },
          js: {
              files: ['public/js/*.js'],
              tasks: ['uglify'],
              options: {
                  //
              }
          }
      },
      clean: {
        build: ['public/build']
      },
      bower: {
        install: {
          options: {
            copy: false,
            verbose: true
          }
        }
      },
      open: {
        dev: {
          path: 'http://localhost:3000/'
        }
      },
      forever: {
        server: {
          options: {
            index: 'app.js',
            logDir: 'logs'
          }
        }
      }
    });

    grunt.registerTask('start', 'run server', function() {
      
      var nodemon = grunt.util.spawn({
        cmd: 'nodemon',
        args: ['app.js']
      });

      nodemon.stdout.pipe(process.stdout);
      nodemon.stderr.pipe(process.stderr);

      var done = this.async();

      setTimeout(function() {
        grunt.task.run('open');
        done();
      }, 400);

    });

    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('grunt-contrib-sass');
    grunt.loadNpmTasks('grunt-contrib-uglify');
    grunt.loadNpmTasks('grunt-contrib-clean');
    grunt.loadNpmTasks('grunt-contrib-copy');
    grunt.loadNpmTasks('grunt-bower-task');
    grunt.loadNpmTasks('grunt-forever');
    grunt.loadNpmTasks('grunt-open');

    grunt.registerTask('default', ['build', 'start', 'watch']);
    grunt.registerTask('deploy', ['build', 'forever:server:start'])
    grunt.registerTask('build', ['clean:build', 'bower', 'copy', 'uglify', 'sass']);
};