I see the 7.13.0-alpha and this version use W18 the 7.13 will be supported in W19? If I want to migrate Camunda to a W19 what I would need to do?
Camunda generally tries to support the currently latest WildFly version when a new minor Camunda version is released. When 7.12 came out, that was W18. According to this rule, W19 should be supported with 7.13 since, I believe, it comes out this March. However, we have some additional rules here: https://docs.camunda.org/manual/latest/introduction/supported-environments/#adding-environments that might delay the support for it (required implementation effort is too high, and time is too short).
Regarding what you would need to do, any specific for the migration will be documented in our
Update & Migration Guide here: https://docs.camunda.org/manual/latest/update/minor/712-to-713/