The case of rapid prototyping of a small prototype for a server backend of ageolocation-based mobile game, using nginx, OpenResty, Redis and Docker willbe examined in the talk. Topics will include: why was the technology stackselected, what are the advantages (and some disadvantages), the architectureof the prototype, and how the features of the stack were used in theimplementation. Some words will be said on how to keep iterations on theprototype rapid and how to upgrade the project from the prototype to aproduction system.