TL;DR

Makes /openapi.json return the same as /swagger/docs.json

What changed?

• Modified the /openapi.json endpoint to dynamically serve Swagger documentation.
• Replaced static file serving with dynamic generation of Swagger documentation.

How to test?

1. Start the API server.
2. Navigate to the /openapi.json endpoint.
3. Verify that the Swagger documentation is served correctly.

Why make this change?

This change improves the flexibility and reliability of Swagger documentation serving. By dynamically generating the documentation, it ensures that the API always serves the most up-to-date version without relying on static files. The added error handling also improves the robustness of the API, providing clear feedback if there are issues with the Swagger documentation.