diff --git a/docker/deployment/Dockerfile b/docker/deployment/Dockerfile
index 2e3fe17c..d8480a3c 100644
--- a/docker/deployment/Dockerfile
+++ b/docker/deployment/Dockerfile
@@ -6,6 +6,7 @@ RUN go build -o init_portainer /init_portainer.go
 RUN chmod +x /init_portainer
 
 # step2: copy build go program to portainer
+# Dockerfile refer to: https://github.com/portainer/portainer/blob/develop/build/linux/Dockerfile
 FROM portainer/portainer-ce:2.19.0
 LABEL maintainer="websoft9<help@websoft9.com>"
 LABEL version="2.19.0"