Add migration guide for node operators

[jennijuju]

@travisperson

[johnnymatthews]

Are there anymore details for this issue? I'm assuming the guide is for migrating from a specific Lotus version to the latest, correct?

[rjan90]

It will be a guide for how to tune the Lotus node for making network migrations as graceful and stable as possible, especially for service providers and archival nodes which might have a lot of states in their chain data and meet extra stress during these periods.

[rjan90]

Will close this issue, given that we have how to disable premigration tutorial in the docs here: thttps://lotus.filecoin.io/kb/disable-premigration/, which we are calling out that RPC and Archival nodes should use in the release notes of every Lotus version that carries a network upgrade, example: