Added initalization help to docs

README.md

@@ -24,6 +24,16 @@ sudo npm install -g cordova --unsafe-perm
 ``` 
 
 ## Build Setup (vuejs)
+You need to add your local configuration file before you do this. The file's name must be `src/components/CommonUtilLocal.vue`, and here's example content:
+```html
+<script>
+	export default {
+		CONST_URL_DOMAIN : 'https://logic.vips.nibio.no',
+		CONST_DEBUG      : false
+	}
+</script>
+```
+Then you can install the dependencies and run the test web server
 
 ``` bash
 # install dependencies