ts2-swift-demangle is the Swift name demangling daemon for trueseeing, for environments that Swift installations are not available (e.g. containers).
It provides a RESTful API to resolve names.
You need to boot it first, as follows:
$ docker run -d --rm --name ts2-swift-demangle ghcr.io/alterakey/ts2-swift-demangle
Then you attach the trueseeing container to it like this, bringing up as http://ts2-swift-demangle (where trueseeing expects at):
$ docker run ... --link ts2-swift-demangle trueseeing target.ipa