Refactor GitHub Actions workflow to streamline dependency installation and testing steps

Author: njay4928

.github/workflows/deploy-app.yaml

@@ -16,8 +16,11 @@ jobs:
         with:
           node-version: 18
 
-      - name: Check node version
-        run: node -v
+      - name: Install dependencies
+        run: npm install
+      
+      - name: Run tests
+        run: npm test