Require nodejs >=22

Author: sverhoeven

README.md

@@ -49,8 +49,8 @@ waitress-serve --listen=127.0.0.1:5000 ws:app
 
 ## Developing
 
-You'll need [node.js](https://nodejs.org/en) to run a local development server.
-Once you've created a project and installed dependencies with `npm install` (or `pnpm install` or `yarn`), start a development server:
+You'll need [node.js](https://nodejs.org/en) (v22 or greater) to run a local development server.
+Once you've created a project and installed dependencies with `npm install`, start a development server:
 
 ```bash
 npm run dev

package.json

@@ -57,5 +57,9 @@
 		"driver.js": "^1.3.1",
 		"layercake": "^8.4.0",
 		"sveaflet": "^0.1.3"
+	},
+	"engines": {
+		"node": ">=22",
+		"npm": ">=9"
 	}
 }