Docs update (!27) · Merge requests · Big Bang / Customers / template

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Updated link to quickstart (was pointing at archived quickstart, now points to updated quickstart)
Improved gpg key creation command to work for gpg 2.0.x, 2.2.x, 2.3.x
Added sops tips and notes section:
- preview https://repo1.dso.mil/cmcgrath/template/-/blob/docs_update/README.md#sops-tip-and-notes
- Added how to use vs code / sublime to edit sops encrypted files + a note about how sops doesn't guarantee that yaml formatting will be preserved.
- Removed a section called ## Key Vault, by absorbing it into the sops tips and notes section
- Added a note to about GPG vs AGE, and how GPG should be preferred over AGE despite the sops repo saying otherwise, due to NIST approved algorithms.
- Added a note about why CSP KMS should be preferred over GPG
- Added a note that if FIPS 140-2 compliant Hashi Vault was desired then an HSM and enterprise license would be required as well.
Added a git repository recommendations section:
- preview https://repo1.dso.mil/cmcgrath/template/-/blob/docs_update/README.md#git-repository-recommendations
- primary goal was to clarify that IL2 and IL4 clusters should have their own repos.