code: func (ctx *Context) ServeFileContent(file string, names ...string) {
  	var name string
  	if len(names) > 0 {
  		name = names[0]
  	} else {
  		name = path.Base(file)
  	}
  
  	f, err := os.Open(file)
  	if err != nil {
  		if Env == PROD {
  			http.Error(ctx.Resp, "Internal Server Error", 500)
  		} else {
  			http.Error(ctx.Resp, err.Error(), 500)
  		}
  		return
  	}
  	defer f.Close()
  
  	ctx.setRawContentHeader()
  	http.ServeContent(ctx.Resp, ctx.Req.Request, name, time.Now(), f)
  }
docs: // ServeFileContent serves given file as content to response.