End-of-life notice

Author: jas14

.github/workflows/checks.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v2
         with:
-          node-version: '16'
+          node-version: '22'
           cache: 'npm'
       - name: Install Dependencies
         run: npm ci

README.md

@@ -1,9 +1,9 @@
 > [!WARNING]
-> ## Deprecation notice
+> ## End-of-life notice
 >
-> This repository is deprecated. Maintainers may respond only to reports of critical bugs and security issues.
-> The application is being rewritten from the ground up in Flutter [here](https://github.com/lichess-org/mobile).
-> Until it is published, if you run into issues with this app, we suggest you use the mobile website.
+> This repository is obsolete and will no longer be updated. It was officially replaced by a complete rewrite,
+> which you can find [here](https://github.com/lichess-org/mobile).
+> If you are unable to install the new app, we suggest you use the mobile website.
 
 [lichess.org/mobile](http://lichess.org/mobile)
 --------------------