public class MustacheInitializer implements ServletContextListener {
@Override
public void contextInitialized(ServletContextEvent sce) {
ServletContext sc = sce.getServletContext();
MustacheEngine engine = MustacheEngineBuilder
.newBuilder()
.setProperty(EngineConfigurationKey.DEBUG_MODE, true)
.setProperty(EngineConfigurationKey.DEFAULT_FILE_ENCODING, "UTF-8")
.addTemplateLocator(new ServletContextTemplateLocator(1,"/","html"))
.build();