Fastify Fruits Example

Hi,
I'm testing your Enchance docs using your fruits example
I modified app/api/fruits.mjs but no enpont gives results
export async function get (req) {
let fruits = ['apple','banana','pears']
return {
json: { fruits }

}
}

http://localhost:3000/ works
http://localhost:3000/about works
http://localhost:3000/fruits shows a blank page
http://localhost:3000/api/fruits
Oops, something went wrong
/api/fruits not found

Curious to know what I'm doing wrong.
I have some rich examples using fastify and htmx and evaluating this repo for comparison
TIA
John
node 16.15.0 on windows 10 home