code: @Override
  	public void addResourceHandlers(ResourceHandlerRegistry registry) {
  		registry.addResourceHandler("/index.html").addResourceLocations("/index.html").setCachePeriod(RESOURCE_CACHE_PERIOD);
  		registry.addResourceHandler("/Tutorial/**").addResourceLocations("/Tutorial/").setCachePeriod(RESOURCE_CACHE_PERIOD);
  	}
docs: 1 week in second