Gruntfile.js

module.exports = function(grunt) {

  // Project configuration.
  grunt.initConfig({
	sass: {
      		options: {
        	  sourceMap: true
     		 },
      		dist: {
        	  files: {
         	   'style.css': 'style.scss'
        	  }
      		 }
    		},
	imagemin: {
    	   dynamic: {
              files: [{
                expand: true,
                cwd: 'images/',
                src: ['**/*.{png,jpg,gif}'],
                dest: 'images/build/'
              }]
    	    }
	},
	watch: {
    	   scripts: {
              files: ['*.scss'],
              tasks: ['sass'],
              options: {
                spawn: false,
              },
            }
	},
	browserSync: {
    	   bsFiles: {
              src : '*.css'
           },
           options: {
              server: {
                 baseDir: "./"
              }
           }
	}
  });
  // Load the plugins tasks
	grunt.loadNpmTasks('grunt-sass');
	grunt.loadNpmTasks('grunt-contrib-imagemin');
	grunt.loadNpmTasks('grunt-contrib-watch');
	grunt.loadNpmTasks('grunt-browser-sync');
  // Default task(s).
  grunt.registerTask('default', ['sass', 'imagemin', 'browserSync', 'watch']);
};