Added github actions

Author: oddball

.github/workflows/ci.yml

@@ -0,0 +1,45 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - "*"
+  pull_request:
+    branches: [master]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [20.x]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: "npm"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build project
+        run: npm run build
+
+      - name: Run tests
+        run: npm test
+
+      - name: Upload test results
+        uses: actions/upload-artifact@v4
+        if: failure()
+        with:
+          name: test-results-${{ matrix.node-version }}
+          path: |
+            test-results/
+            coverage/
+          retention-days: 7