Add setup rancher and harvester in air-gapped environment

[FrankYang0529]

No description provided.

[TachunLin]

LGTM. Appreciate for the update

[guangbochen]

The content looks good to me, but in regards to the Rancher air-gap setup, I would prefer to link it to a particular Rancher doc page as Rancher should constantly maintain and update it, but we can always add some important notes on this section.

[LucasSaintarbor]

Made some small changes. LGTM 👍 @TachunLin is it okay to merge this? I will create a different PR to add this to https://github.com/harvester/docs/blob/main/versioned_docs/version-v1.1/airgap.md

[TachunLin]

Hi @LucasSaintarbor, thanks for the check.
It looks good to me. Please feel free to merge

if you are going to create a separate PR for adding the changes.
A suggested update is we can add indent to the code block to let the numbering bullet work better.

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[LucasSaintarbor]

Hi @FrankYang0529, sorry for being late to this. Since this PR is older, is was created using the old site generator Material for MkDocs and not Docusaurus 2. I am going to create a new PR from my fork https://github.com/LucasSaintarbor/harvester-docs/tree/main with the same changes, and then I'll follow up here to close this PR.

[FrankYang0529]

Hi @FrankYang0529, sorry for being late to this. Since this PR is older, is was created using the old site generator Material for MkDocs and not Docusaurus 2. I am going to create a new PR from my fork https://github.com/LucasSaintarbor/harvester-docs/tree/main with the same changes, and then I'll follow up here to close this PR.

Hi @LucasSaintarbor, thanks for the help. Sounds good to me. Feel free to close this PR after you submit a new one. 👍

[LucasSaintarbor]

Per #137 (comment), opened new PR #371 - Updated airgap.md with steps to setup rancher and harvester in air-gapped env #371