The Backend API is documented here
npm install -g @ionic/cli
npm i -D -E @angular/cli
Run a development server at http://localhost:8100
ionic serve
ionic serve --external
The IP-address to connect to will be written in the terminal output as "External: IP"
ionic build --prod
The output html files will be written to TR_EC_Frontend/www
Copy them onto a webserver to provide the frontend to users.