问提问！使用docker时，会将每一次操作都打包成tag，为什么导致出现多个none tag？

[root@docker-images huaweicloud]# ./build.sh proxy 2024-0306
Build project proxy 2024-0306 ...
Sending build context to Docker daemon  112.6MB
Step 1/9 : FROM centos-demo:1.0.0
 ---> adac736fc659
Step 2/9 : ADD *.jar ${ADMIN_HOME}/app/app.jar
 ---> c29ec363fff8
Step 3/9 : ADD application.yml ${ADMIN_HOME}/app/application.yml
 ---> 75cc22f0d8d1
Step 4/9 : ADD start.sh ${ADMIN_HOME}/app/start.sh
 ---> 484ef30c94dc
Step 5/9 : ENV LANG='en_US.UTF-8'
 ---> Running in 5413fbba40be
Removing intermediate container 5413fbba40be
 ---> c7fde5125960
Step 6/9 : ENV TERM=xterm
 ---> Running in 7a5b0b554aa4
Removing intermediate container 7a5b0b554aa4
 ---> ed2096e55f0c
Step 7/9 : RUN mkdir -p ${ADMIN_HOME}/app/logs
 ---> Running in 9758d2dc534a
Removing intermediate container 9758d2dc534a
 ---> a157180b5ce4
Step 8/9 : WORKDIR ${ADMIN_HOME}/app
Removing intermediate container 36313e9028a9
 ---> 12864df8c38b
Step 9/9 : CMD ["/bin/bash", "/home/admin/app/start.sh"]
 ---> Running in 31f72a54ee1c
Removing intermediate container 31f72a54ee1c
 ---> 8eaddf3bf059
Successfully built 8eaddf3bf059
Successfully tagged proxy:2024-0306
save image over.
[root@docker-images huaweicloud]# docker images -a
REPOSITORY                                                      TAG                 IMAGE ID            CREATED             SIZE
proxy                                                       2024-0306           8eaddf3bf059        15 seconds ago      845MB
<none>                                                          <none>              12864df8c38b        15 seconds ago      845MB
<none>                                                          <none>              ed2096e55f0c        16 seconds ago      845MB
<none>                                                          <none>              a157180b5ce4        16 seconds ago      845MB
<none>                                                          <none>              75cc22f0d8d1        16 seconds ago      845MB
<none>                                                          <none>              c7fde5125960        16 seconds ago      845MB
<none>                                                          <none>              484ef30c94dc        16 seconds ago      845MB
<none>                                                          <none>              c29ec363fff8        16 seconds ago      845MB