This step verifies that the main components are working before document upload begins. The purpose is to make sure any later failure can be traced to workflow logic rather than a missing infrastructure prerequisite.
Before uploading documents, please verify the following infrastructure conditions:
Step 1: Ensure the Frontend is reachable in the browser and verify the CloudFront distribution configuration.

Step 2: Verify that the S3 buckets are visible in the AWS Console, and ensure they are ready for storage and access.

Step 3: Check that the EC2 instance is running the backend service properly and the API backend responds correctly.

Step 4: Ensure the RDS PostgreSQL database is available and ready to store document metadata.

Note: Checking the infrastructure thoroughly at this stage makes troubleshooting much easier during later integration steps.