Add test and build ci workflow.

.github/workflows/ci.yml

@@ -0,0 +1,30 @@
+name: Test and Build
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Use Node.js 16.x
+        uses: actions/setup-node@v2
+        with:
+          node-version: "16.x"
+
+      - name: Clear and Reinstall Dependencies
+        run: |
+          rm -rf node_modules package-lock.json
+          npm install
+
+      - name: Run Tests
+        run: npm test
+
+      - name: Build
+        run: npm run build