Fix shared folder on Canonical k8s

[misohu]

Closes: #194

This PR is merged against dev branch for Canonical k8s integration. There are some other tasks which needs to be finished before merging to main.

This change could be only tested manually. Tests are supposed to fail.

1. Deploy caonical k8s

sudo snap install k8s --classic

2. Bootstrap

sudo k8s bootstrap

3. According to documentation they recommend to enable local storage

sudo k8s enable local-storage

4. Go to this repo and pack the snap

snapcraft

5. You should be prompted with the snap file which we will now deploy to your computer.

sudo snap install data-science-stack_0.1-<hash>_amd64.snap --dangerous

6. Initialise the DSS

data-science-stack.dss initialize --kubeconfig="$(echo "$(sudo k8s config)")"

7. Now create an example notebook

data-science-stack.dss create my-notebook-scipy --image=kubeflownotebookswg/jupyter-scipy:v1.8.0

8. Connect to notebook. Now you should be able to create notebook file under shared folder.

[mvlassis]

Works as intended, nice work!