adding build step for serving

package.json

@@ -7,7 +7,7 @@
     "author": "Fiore Basile <fiore.basile@gmail.com>",
     "private": true,
     "scripts": {
-        "start": "quasar serve",
+        "start": "quasar build && quasar serve dist",
         "test": "echo \"See package.json => scripts for available tests.\" && exit 0",
         "test:unit": "jest --updateSnapshot",
         "test:unit:coverage": "jest --coverage",