apollo-common/src/main/java/com/ctrip/framework/apollo/common/controller/WebMvcConfig.java/WebMvcConfig/addResourceHandlers
class WebMvcConfig:  @Override
  public void addResourceHandlers(ResourceHandlerRegistry registry) {
    // 10 days
    addCacheControl(registry, "img", 864000);
    addCacheControl(registry, "vendor", 864000);
    addCacheControl(registry, "scripts", 864000);
    addCacheControl(registry, "styles", 864000);
    // 1 day
    addCacheControl(registry, "views", 86400);
    addCacheControl(registry, "i18n", 86400);
  }