Web development
We used the Flask web framework (https://palletsprojects.com/p/flask/) to develop the websites. MongoDB was used as a document-oriented cross-platform database program (https://www.mongodb.com). The Elm language (https://elm-lang.org) was used for declarative creation of graphical user interfaces based on a web browser. The S1 server can be accessed athttp://oka.protres.ru:4200.