Sadly like many Docker Swarm based projects, this has become abandonware. I use Docker Swarm with Portainer for managing services with ecoeats[1], a decision that was made years ago, just before Swarm was revealed to be absolutely dead in the water. I initially used Swarmlet before switching to Portainer, as there were far too many bugs and missing tools needed to effectively manage a Swarm that went beyond stateless Node containers.
With Portainer and Swarm I've been forced to manually intervene with rollouts more times than I would have liked due to Swarm-specific errors and other quirky networking behaviour. At least it's simpler than Kubernetes!