Update Dockerfile (#4775)

Set the Author field of the generated images. This instruction has been deprecated in favor of LABEL.

docker/Dockerfile

@@ -1,6 +1,6 @@
 FROM canal/osbase:v2
 
-MAINTAINER agapple (jianghang115@gmail.com)
+LABEL agapple (jianghang115@gmail.com)
 
 # install canal
 COPY image/ /tmp/docker/
@@ -34,4 +34,4 @@ EXPOSE 11110 11111 11112 9100
 WORKDIR /home/admin
 
 ENTRYPOINT [ "/alidata/bin/main.sh" ]
-CMD [ "/home/admin/app.sh" ]
+CMD [ "/home/admin/app.sh" ]