Add page about Docker Desktop to documentation

[rgaiacs]

This PR adds a page covering how to set up Kubernetes using Docker Desktop for development.

I tested the steps from Installing JupyterHub.

The basic Helm deployment

helm upgrade --cleanup-on-fail \
  --install dd-demo jupyterhub/jupyterhub \
  --namespace jupyterhub-demo \
  --create-namespace \
  --version=4.1.0 \
  --values config.yaml

work as expected.

kubectl get pod --namespace jupyterhub-demo

lists all pods running

NAME                             READY   STATUS    RESTARTS   AGE
continuous-image-puller-4tqvf    1/1     Running   0          31m
hub-7b5d9cb9f4-slbwc             1/1     Running   0          31m
jupyter-dummy                    1/1     Running   0          29m
proxy-8f749748f-ffb2x            1/1     Running   0          31m
user-scheduler-88b85bfb5-n79bv   1/1     Running   0          31m
user-scheduler-88b85bfb5-v2ncp   1/1     Running   0          31m

and

kubectl --namespace jupyterhub-demo get service proxy-public

lists an external IP port that works for local development

NAME           TYPE           CLUSTER-IP    EXTERNAL-IP   PORT(S)        AGE
proxy-public   LoadBalancer   10.99.50.90   10.6.46.141   80:32135/TCP   32m

This should help new developers to contribute, specially Windows users.

[manics]

@consideRatio what do you think? I'm a bit reluctant to recommend Docker Desktop to beginners, especially given the complex licensing.

[rgaiacs]

I'm a bit reluctant to recommend Docker Desktop to beginners

I'm also reluctant but "Docker Desktop" is probably what beginners are taught to use at their school.

One alternative is to recommend "podman desktop" but for that we should make podman a first class in repo2docker.

[consideRatio]

We are having docs on setting up against loads of third party paid services, so i figure its fine - but i'd like to list it below minikube and not at the top before minikube.

[consideRatio]

I appreciate how these docs wasnt too detailed, which would make me concerned that we'd need to maintain details over time - instead its mostly linking out and providing high level steps.

[rgaiacs]

but i'd like to list it below minikube and not at the top before minikube.

Done.

[consideRatio]

Wdyt @manics?