Add environment key to build task list.

.github/workflows/build-and-deploy.yml

@@ -33,6 +33,9 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
+      - name: Create web-app .env file
+        run: echo 'GEMINI_API_KEY=${{ secrets.GEMINI_API_KEY }}' > web-app/.env
+
       - name: Build and push web-app image 🚀
         uses: docker/build-push-action@v6
         with: