Create main.yml

.github/workflows/main.yml

@@ -0,0 +1,16 @@
+name: React CI-OHours
+
+on: [push]
+
+jobs:
+  build:
+    name: Build and unit test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '21'
+      - run: npm install
+      - run: npm run build --if-present
+      - run: npm test