I'm new to kubernetes and not sure what prerequisite I'm missing in order to make it work.

I ran the following command

kubectl create -f k8s-pod.yml 

and the response is

The connection to the server localhost:8080 was refused - did you specify the right host or port?

k8s-pod.yml

apiVersion: v1
kind: Pod

metadata:
  name: app
  labels:
    language: go
    env: test

spec:
  containers:
    - name: app
      image: app:1.0.8
      ports:
        - containerPort: 8080
          protocol: TCP