Simple website converting letters to opposite cases

Python server with HTTP (JS fetch)

• index.html, script.js, style.css and server.py
• using package flask for HTTP server
  • start the server with python server.py

C++ server with Websocket

• index_websocketpp.html, script_websocketpp.js, style.css and server_websocketpp.cpp
• using websocketpp for websocket server
  • g++ server_websocketpp.cpp -o server_websocketpp.out
  • start the server with ./server_websocketpp.out
  • adding -I{path}/include if necessary