diff --git a/docs/wiki.md b/docs/wiki.md
index 3f07c99..f84cc80 100644
--- a/docs/wiki.md
+++ b/docs/wiki.md
@@ -92,3 +92,32 @@ func encodeCreateGroupResponse(response CreateGroupRes, w http.ResponseWriter, s
         switch response := response.(type) {
             w.Header().Set("Access-Control-Allow-Origin", "https://card.syui.ai")
 ```
+
+### northflank
+
+`cron`, `repo(private)`, `pass(token)`
+
+```sh
+#!/bin/zsh
+
+pass=password
+/usr/bin/northflank exec service --project $project --service $service --cmd "/app/data/api/backup.sh $pass"
+
+function f(){
+    rm /app/data/api/backup.sh
+    echo '#!/bin/bash
+    pass=$1
+    git config --global user.email syui@syui.ai
+    git config --global user.name syui
+    cp -rf /app/data/new.sqlite /app/data/api/latest.sqlite
+    cp -rf /app/data/new.sqlite /app/data/api/`date '+%w'`.sqlite
+    cd /app/data/api
+    git remote add origin https://$pass@github.com/ai/api
+    git add .
+    git commit -m backup
+    git push origin main
+    git remote rm origin
+    ' >> /app/data/api/backup.sh
+    chmod +x /app/data/api/backup.sh
+}
+```