fix(ci): add production build checks for examples

Author: yogeshchoudhary147

.github/workflows/integration.yml

@@ -63,9 +63,26 @@ jobs:
       - name: Build SDK
         run: npm run build
 
+      - name: Pack SDK
+        run: npm pack
+
       - name: Install examples
         run: npm run install:examples
 
+      - name: Install local SDK into CRA example
+        run: npm install --prefix=examples/cra-react-router $(ls auth0-auth0-react-*.tgz) --legacy-peer-deps
+
+      - name: Build CRA example (production)
+        run: npm run build --prefix=examples/cra-react-router
+        env:
+          CI: false
+
+      - name: Build Next.js example (production)
+        run: npm run build --prefix=examples/nextjs-app
+
+      - name: Build Gatsby example (production)
+        run: npm run build --prefix=examples/gatsby-app
+
       - name: Run integration test (CRA)
         run: npm run test:cra