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what does the devServer need to return for a custom devserver?

Hi, there's an example here: https://docs.cypress.io/guides/component-testing/component-framework-configuration#Custom-Dev-Server

And this type might be useful if you want to poke around a bit to see how it works: https://github.com/cypress-io/cypress/blob/a7ecbec2a3a13891fee01bdcc121c769a681eca5/cli/types/cypress.d.ts#L5507

is there a migration guide for using the previous method on injecting a custom devserver vs now?

you know like how to migrate from Cypress.PluginConfig to Cypress.DevServerConfig