.env.production file eliminated ! (-> .env)

.env.production worked in local
added myconfig
messagepopup working (but not ready yet)
added Graphql (only module)

src/plugins/error-handler.js

@@ -0,0 +1,7 @@
+// import something here
+import errorHandler from '../error-handler'
+// leave the export, even if you don't use it
+export default ({ app, router, Vue }) => {
+  // something to do
+  Vue.prototype.$errorHandler = errorHandler
+}