Change the full-stack boxes folio/stable and folio/testing so that they can be run on a single host and on the single standard port 80 (or 443 when using https).
Several libraries have strict firewall settings where ports like 9130 are blocked. To make demoing and testing FOLIO as easy as possible the full-stack boxes should come with a default installation with front end and back end on the same port (80 or 443). (The option to configure other hostnames and ports can still remain.)
Having frontend and backend on the same hostname and port has the additional benefit that the browser doesn't send any Cross-Origin Resource Sharing (CORS) preflight requests; there may be some locations where this significantly reduces the latency.