fix(k3s): forward real IP to Fillcode CN proxy

flux/apps/deployment-fillcode-cn.yaml

@@ -28,6 +28,7 @@ data:
         proxy_ssl_name fillcode.com;
         proxy_set_header Host fillcode.com;
         proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Dev-Cm-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header X-Forwarded-Host $host;
         proxy_set_header X-Forwarded-Proto $scheme;