Following on from this question about how to host a standard Logic App in a Docker container in App Service. I have started down the same path based on the tip provided here but am hitting a wall when trying to create the metadata about the logic app in the Azure portal.
The Logic App create flow in the portal offers two hosting options - workflow and docker container. Workflow offers one of the custom app service plans for workflow and doesn't allow selection of an existing app service.
The docker container choice invites you to select a Region, stating that
Docker containers are only supported with custom locations. In order to run from a Docker container, either create a new custom location or switch to a subscription which already has one.
While the messaging is unclear here, it seems that this requires a container app environment, meaning this choice targets the preview for container apps. (edit: I created a container app and it didn't show up as an option as a custom region, so I'm still not sure what that is)
I'd like to leverage an existing app service plan to host my docker-contained Logic App workflow, but I'm unclear how to create a resource in Azure which would represent that Logic App. Is this possible?