Implementing an endpoint to create a note using HTTP verb POST

To create a record of Note in the database, we will implement the endpoint that meets specific requirements. Let's make a list of the requirements for our create endpoint to gain an understanding of what the request and response should look like.

The request is expected to meet the following criteria:

• The HTTP method will be POST.
• The HTTP route will be /notes/.
• The request body will have a payload representing Note in JSON format.

The response is expected to meet the following criteria:

• When a malformed JSON is present in the request payload, or when a message is not unique, we expect the following to occur:
  • The response body will have a CustomResponse struct encoded into JSON format whose message and status field are set accordingly.
  • The status code will show 400, Bad Request.
• If the proper JSON payload of Note is present in the request body, respond with the following:
  • Insert the...