add scripts to run in json.package

Author: wcywin

package.json

@@ -4,7 +4,14 @@
   "description": "node-sass project",
   "main": "index.html",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "watch:sass": "node-sass sass/main.scss css/style.css -w",
+    "devserver": "live-server",
+    "start": "npm-run-all --parallel devserver watch:sass",
+    "compile:sass": "node-sass sass/main.scss css/style.comp.css",
+    "concat:css": "concat -o css/style.concat.css css/icon-font.css css/style.comp.css",
+    "prefix:css": "postcss css/style.concat.css -u autoprefixer > css/style.prefix.css",
+    "compress:css": "node-sass css/style.prefix.css css/style.css --output-style compressed",
+    "build:css": "npm-run-all compile:sass concat:css prefix:css compress:css"
   },
   "keywords": [
     "css",