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.