Docs don't clearly expose the minimum disk requirements

[kimwnasptd]

Bug Description

Right now the docs mention that minimum disk size, because of MicroK8s is 20Gb. But the default notebooks of DSS are ~10Gb each. So users will need more space to be able to run them

https://documentation.ubuntu.com/data-science-stack/en/latest/tutorial/getting-started/

To Reproduce

Try to follow follow the guide and create a VM with 20Gb

If you then try to create 2 notebooks you'll hit the issue posted in #151

Environment

A VM with 20Gb

Relevant Log Output

<none>

Additional Context

No response

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The internal ticket has been created: https://warthogs.atlassian.net/browse/KF-6048.

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[kimwnasptd]

@afgambin I'd propose that we have ~50Gb as minimum requirement.

How do you think we should re-organise the page for this?

[afgambin]

@kimwnasptd I'll do a quick fix to that note box next week.