Gruntfile.js

// var Grunt = require("grunt")

module.exports = function(Grunt) {
    Grunt.config.init({
        clean: {
            src: [
                "builds"
            ]
        },
        watch: {
            main: {
                files: [
                    "source/index.html",
                    "source/index.css",
                ],
                tasks: [
                    "copy"
                ]
            },
            options: {
                atBegin: true,
            }
        },
        copy: {
            main: {
                src: [
                    "index.html",
                    "index.css",
                ],
                cwd: "source/",
                dest: "builds/web",
                expand: true
            }
        }
    })

    Grunt.loadNpmTasks("grunt-contrib-copy")
    Grunt.loadNpmTasks("grunt-contrib-watch")
    Grunt.loadNpmTasks("grunt-contrib-clean")

    Grunt.registerTask("default", ["clean", "watch"])
}