npm version 7 required

README.md

@@ -2,7 +2,8 @@ VAPARA-VUE3
 ===========
 
 Vapara is frontend application for online shop.
-Based on Vue3, it relies on Dolibarr's API calls
+Based on Vue3, it relies on Dolibarr's API calls.
+`npm` version 7 required!
 
 HOW TO RUN
 ----------

package.json

@@ -9,6 +9,9 @@
     "preview": "vite preview",
     "linter": "eslint --ext .js,.ts,.vue --ignore-pattern \"*.d.ts\" src"
   },
+  "engines": {
+    "npm": ">7"
+  },
   "dependencies": {
     "typescript": "4.1.x",
     "vue": "3.x"