full upgrade (#31)

* ✨ chore: update CI workflow to include testing and multi-arch build (#29)

* ✨ chore: remove unused dependencies from package-lock.json and updated to a better local dev environment (#30)

* ✨ test: add unit tests

* ✨ test: add unit tests for whole project

* ✨ feat: add whatwg-fetch for improved fetch support

* ✨ chore: update Node.js version to 22 in workflow

* ✨ refactor: update types and improve email handling tests

* ✨ refactor: remove unused imports

* ✨ fix: normalize image name to lowercase in workflows

* ✨ fix: ensure Docker image names are consistently lowercase

* ✨ chore: update

* ✨ chore: update base URL to use secret variable

* ✨ chore: update to login to ghcr

* ✨ fix: add missing 'fi' to close if statement in workflow

app/__tests__/api/og.test.tsx

@@ -0,0 +1,14 @@
+import { GET } from '@/app/api/og/route';
+import { ImageResponse } from 'next/og';
+
+jest.mock('next/og', () => ({
+  ImageResponse: jest.fn(),
+}));
+
+describe('GET /api/og', () => {
+  it('should return an Open Graph image', async () => {
+    await GET();
+
+    expect(ImageResponse).toHaveBeenCalled();
+  });
+});