set log max size and file (#173)

Co-authored-by: Yu Hu <[email protected]>

Author: yuhuyoyo

startupscript/butane/006-start-proxy-agent.sh

@@ -46,6 +46,8 @@ readonly OPTIONS
 docker start "proxy-agent" 2>/dev/null \
   || docker run \
       --detach \
+      --log-opt max-size=10m \
+      --log-opt max-file=3 \
       --name "proxy-agent" \
       --restart=unless-stopped \
       --net=host "${PROXY_IMAGE}" \