Implementing an endpoint to retrieve all notes using HTTP verb GET

To retrieve all notes, we will implement an endpoint that meets specific requirements. Let's make a list of these requirements 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 GET.
• The HTTP route will be /notes/.

The response is expected to meet the following criteria:

• Select all of the notes from the database using the built-in orm-based syntax.
• Encode the notes retrieved from the database into JSON format, which results in a JSON array.
• The status code will show 200, Ok.
• The response body will have a JSON array of encoded Note collection.
• The Content-Type response header will be set to application/json.

With this information, we will go on to define a route to retrieve all notes.

Defining a route to retrieve all notes

Now, we will create a struct...