The dilemma we face with API Management is being able to deploy the custom Developer Portal (customized through the APIM publisher portal UI) changes to each different environme
Git configuration is the only option but it doesn’t cover artifacts which created via CMS UI, the static content like such as welcome page, etc.
FYI, And the Git base solution requires that the instance becomes read-only (or locked to a single-user) during operation.
Please vote this wish in APIM