A simple gruntfile boilerplate that I use for single page web apps.

gruntfile.js

'use strict';

module.exports = function (grunt) {
  grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),
    express: {
      all: {
        options: {
          port: 9000,              
          hostname: 'localhost',
          bases: './src',
          livereload: true
        }
      }
    },
    jshint: {
      files: ['src/js/main.js'],
      options: {
        globals: {
          console: true,
          module: true,
          jQuery: true
        }
      }
    },
    concat: {
      options: {
        seperator: ';'
      },
      dist: {
        src: [
          'src/js/main.js'
        ],
        dest: 'src/js/main.cat.js'
      }
    },
    uglify: {
      options: {
        banner: '/*! <%= pkg.name %> <%= grunt.template.today("dd-mm-yyyy") %> */\n',
        sourceMap: 'src/js/main.min.js.map',
        sourceMapRoot: '/',
        sourceMappingURL: 'src/js/main.min.js.map',
        sourceMapPrefix: 1,
        mangle: true,
        compress: {
          global_defs: {
            'DEBUG': false
          },
          dead_code: true
        },
        report: 'min'
      },
      dist: {
        files: {
          'src/js/main.min.js': [
            'src/js/main.js'
          ]
        }
      }
    },
    handlebars: {                         
      options: {
        namespace: 'App.Templates'
      },
      compile: {
        files: {
          'src/js/tmpls.js': [
            'src/tmpls/index.hbs'
          ]
        }
      }
    },
    compass: {
      dist: {
        options: {
          httpPath: '/',
          sassDir: 'src/sass',
          cssDir: 'dist/css',            
          relativeAssets: true,
          outputStyle: 'compressed'
        }
      }
    },
    htmlmin: {
      dist: {
        options: {
          removeComments: true,
          collapseWhitespace: true,
          removeRedundantAttributes: true,
          collapseBooleanAttributes: true
        },
        files: {
          'src/index.html': 'src/index.unmin.html'
        }
      }
    },
    watch: {
      options: {           
        livereload: true   
      },                   
      html: {
        files: ['src/*.html'],
        tasks: ['compile_html']
      },
      scripts: {
        files: [
          'src/js/main.js',
          'src/tmpls/*.hbs',
        tasks: ['compile_scripts']
      },
      css: {
        files: ['src/sass/*.scss'],
        tasks: ['compile_css']
      }
    },
    shell: {
      mycommand: {
        command: 'echo "my command"',
        options: {
          stdout: true
        }
      }
    }
  });
  grunt.loadNpmTasks('grunt-contrib-jshint');
  grunt.loadNpmTasks('grunt-contrib-concat');
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-handlebars');
  grunt.loadNpmTasks('grunt-contrib-compass');
  grunt.loadNpmTasks('grunt-contrib-htmlmin');
  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.loadNpmTasks('grunt-express');
  grunt.loadNpmTasks('grunt-shell');
  grunt.registerTask('jshint', ['jshint']);
  grunt.registerTask('compile_scripts', ['handlebars', 'uglify']);
  grunt.registerTask('compile_css', ['compass']);
  grunt.registerTask('compile_html', ['htmlmin']);
  grunt.registerTask('default', ['express', 'watch']);
};

npm-install

# Install dependencies
sudo npm install --save grunt grunt-cli grunt-contrib-jshint grunt-contrib-concat grunt-contrib-uglify grunt-contrib-handlebars grunt-contrib-compass grunt-contrib-htmlmin grunt-contrib-watch grunt-express grunt-shell

# Run
grunt