AddRequestId adds a request ID to the request context if it doesn't already exist.

Chain is a variadic function that takes a Handler and a list of functions that return a Handler.

CORS adds the necessary headers to allow CORS requests.

ErrorHandler handles errors and returns the appropriate response.

Example is a simple example of how middleware can be used to wrap the request handling logic.

JsonResponse adds the application/json content type to the response header.

Log is a middleware that logs the request and response to the logger.

Recoverer recovers from panics and returns a 500 Internal Server Error.