Docker has cemented itself as mainstay in modern tech, but it is often used for modernizing legacy apps. But a legacy app might be more than that old Classic ASP e-commerce site that your mom uses to sell crochet creations on. A legacy app can basically be anything that is old and old DOS games and BBS’s are no exception. Building a platform that can run old DOS games in a container and hosting that container in the cloud can be a lot of fun, giving you an online retro gaming server. …