在GO中返回简单的JSON响应

I am currently moving an Express API over to a Golang implementation.

In Express, if I want to return a simple, ad hoc json response I can do like

app.get('/status', (req, res) => res.json({status: 'OK'}))

However, I am struggling to understand this in Go.

Do I need to create a struct for this simple response?

I was trying something like this

func getStatus(w http.ResponseWriter, r *http.Request) {
    w.Header().Set("Content-Type", "application/json")
    json.NewEncoder(w).Encode({status: "OK"})
}

but this is obviously not going to work.