Move manual backup docs

[kcpevey]

Reference Issues or PRs

Resolves #118

What does this implement/fix?

Put a x in the boxes that apply

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds a feature)
• Breaking change (fix or feature that would cause existing features to not work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build related changes
• Other (please describe):

Testing

• Did you test the pull request locally?
• Did you add new tests?

Documentation

Access-centered content checklist

Text styling

• The content is written with plain language (where relevant).
• If there are headers, they use the proper header tags (with only one level-one header: H1 or # in markdown).
• All links describe where they link to (for example, check the Nebari website).
• This content adheres to the Nebari style guides.

Non-text content

• All content is represented as text (for example, images need alt text, and videos need captions or descriptive transcripts).
• If there are emojis, there are not more than three in a row.
• Don't use flashing GIFs or videos.
• If the content were to be read as plain text, it still makes sense, and no information is missing.

Any other comments?

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[kcpevey]

There are some images that need to be migrated too, but I only want to add those back if you want to keep them.

[viniciusdc]

@kcpevey, the preview is failing, do you know why that might be happening? sorry, found it, I missed this in the logs

Exhaustive list of all broken links found:

- On source page path = /docs/how-tos/manual-backup:
   -> linking to ./awss3curl.md (resolved as: /docs/how-tos/awss3curl.md)
   -> linking to ../installation/login.md (resolved as: /docs/installation/login.md)

Will fix in the review

[viniciusdc]

Removing links that do not exists for now, will add replacements later

[kcpevey]

Ah, yes. I intended to take care of the CI failures for you after you added your text edits, but it seems you did that first :) I'm happy to take care of any formatting or anything else. I just need help with content.

[viniciusdc]

@kcpevey, the above docs are up to date and will work with the migration. Though I can foresee we will need to add more to this later, once we migrate beta to nebari-v2022.10.1 we will be able to add more to this. For now, to get thing unblocked for the release this is good enough 😄