更新 README.md，添加 syncthing 使用示例和配置说明

stacks/sything/README.md

@@ -2,4 +2,27 @@
 [![Try in PWD](https://raw.githubusercontent.com/play-with-docker/stacks/master/assets/images/button.png)](http://play-with-docker.com?stack=https://raw.githubusercontent.com/yanhao98/docker-example/refs/heads/main/stacks/sything/docker-compose-pwd.yml)
 ```bash
 wget https://raw.githubusercontent.com/yanhao98/docker-example/refs/heads/main/stacks/sything/docker-compose.yml && docker-compose up -d
+```
+
+## st-1
+```bash
+HOSTNAME=服务器主机名
+SOURCE1=/path/to/backup1
+
+docker run -d --restart unless-stopped --name syncthing \
+  -h $HOSTNAME \
+  -v $SOURCE1:/host$SOURCE1 \
+  --mount type=volume,source=st-sync-cfg,target=/var/syncthing/config \
+  -e PUID=0 -e PGID=0 \
+  -e TZ=Asia/Shanghai \
+  -p 28198:8384 -p 22000:22000/tcp -p 22000:22000/udp -p 21027:21027/udp \
+  syncthing/syncthing
+```
+
+- 访问`https://服务器ip:28198`
+- 设置用户名密码
+- 添加文件夹: 文件夹路径固定填`/host`
+
+```bash
+docker exec -it syncthing find /host -maxdepth 3
 ```