Mandate node version for toolpad-app (mui#1141)

Author: Janpot

netlify.toml

@@ -8,7 +8,7 @@
   command = "yarn docs:build && yarn docs:export"
 
 [build.environment]
-  NODE_VERSION = "14"
+  NODE_VERSION = "16"
   # Not using `playwright` when building docs.
   PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD = "1"
 

package.json

@@ -91,6 +91,7 @@
     "@types/react-dom": "18.0.6"
   },
   "engines": {
-    "npm": "please-use-yarn"
+    "npm": "please-use-yarn",
+    "node": ">=16.17"
   }
 }