{
  "service": "image-watermark-service",
  "tip": "水印信息固定值可修改 config.js 中的 WATERMARK_INFO；字号按“每个字符占图片宽度的百分比”计算，默认 4%",
  "endpoints": [
    {
      "method": "GET",
      "url": "/",
      "desc": "服务说明"
    },
    {
      "method": "POST",
      "url": "/watermark",
      "desc": "处理单张图片，body: {\"filename\":\"xxx.png\",\"charPercent\":4}"
    },
    {
      "method": "POST",
      "url": "/watermark/all",
      "desc": "批量处理根目录下所有图片，body 可选 {\"charPercent\":4}"
    },
    {
      "method": "POST",
      "url": "/upload",
      "desc": "小程序直传：multipart 上传图片并加水印，返回水印文件名"
    }
  ]
}