Create jest.yml

.github/workflows/jest.yml

@@ -0,0 +1,22 @@
+name: Jest unit testing
+
+on: push
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x, 22.x]
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v4
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'yarn'
+    - run: npm ci
+    - run: npm run build --if-present
+    - run: npm test