Implement GET /shows/{id} Endpoint for Retrieving a Show by ID

[Lapotor]

Description:

The task involves implementing a GET endpoint to retrieve a specific show based on its unique ID. This endpoint will provide a detailed representation of the show, including its title, start and end dates, live status, and associated moderators.

Tasks:

• Set up the route and controller for the GET /shows/{id} endpoint.
• Validate the id parameter to ensure it corresponds to an existing show.
• Retrieve the show details from the database based on the provided id.
• Serialize the show data in accordance with the specified response format.
• Handle cases where the requested show is not found and return an appropriate error response.

Additional Considerations:

• Ensure that the response follows the defined Swagger/OpenAPI specification for the GET /shows/{id} endpoint.
• Implement proper error handling and response codes for various scenarios (e.g., show not found, server error).
• Write unit tests to validate the functionality of the endpoint.

Acceptance Criteria:

• The GET /shows/{id} endpoint successfully retrieves and returns the details of the specified show.
• Proper error responses are provided in case of invalid or non-existent show IDs.