adding build step for serving

package.json

@@ -8,6 +8,7 @@
   "private": true,
   "scripts": {
     "start": "quasar serve --history  dist/spa",
+    "build": "quasar build",
     "test": "quasar test --unit jest",
     "test:unit": "jest --updateSnapshot",
     "test:unit:coverage": "jest --coverage",