build: Add build task

Author: Andrey Okonetchnikov

package.json

@@ -11,11 +11,12 @@
   },
   "scripts": {
     "postinstall": "preconstruct dev",
-    "test": "echo \"Error: no test specified\" && exit 0",
-    "lint": "eslint .",
+    "build": "preconstruct build",
+    "start": "styleguidist server",
     "styleguide": "styleguidist server",
     "styleguide:build": "styleguidist build",
-    "start": "styleguidist server"
+    "test": "echo \"Error: no test specified\" && exit 0",
+    "lint": "eslint ."
   },
   "author": "Andrey Okonetchnikov <andrey@okonet.ru>",
   "license": "MIT",