Configure renovate for NPM

Author: jotak

renovate.json

@@ -18,6 +18,15 @@
       }
     ]
   },
+  "npm": {
+    "schedule": ["* * 7 */3 *"],
+    "packageRules": [
+      {
+        "matchManagers": ["npm"],
+        "groupName": "NPM packages"
+      }
+    ]
+  },
   "dockerfile": {
     "packageRules": [
       {