Start the web server with npm start. View the compiled HTML at localhost:8082/html/FILENAME. It should be accessible on the LAN as well (find your IP address with hostname -I). The server rebuilds all the compiled HTML on any change to the source handlebars templates or CSS files. If you add a new template, you will need to add to compiler.mjs's contexts object and restart the web server. Screenshots of the templates are saved to ./images.