DOCKER: unable to find or login to repository

Hello, I am on lesson 7 “Docker in action”.
I followed the lesson and I have created the image.

I typed: docker run hello-docker

I got: Error response from daemon: pull access denied for hello-docker, repository does not exist or may require ‘docker login’: denied: requested access to the resource is denied.

How can I solve this problem? Thank you, Ivan

Does it need to be this?

docker run hello.docker

I got an error again.

What does your Dockerfile look like?

FROM node:alpine

COPY . /app


CMD node /app.js

I found the error!
I had to write: CMD node app.js

Thank you