I build a docker image and push it to my custom registry with a relevant tag. But when I pull it from my registry it is shown below. Some images pulled from the official docker registry. Can anyone explain why the image tag is shown as ?
[root@host ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
my_registry_com/reposity_name/video-chat-app <none> a1dbe7adbec5 36 hours ago 179MB
my_registry_com/reposity_name/video-chat-app <none> 227e89445050 3 days ago 179MB
my_registry_com/reposity_name/video-chat-app <none> 61e974a9826a 3 days ago 179MB
my_registry_com/reposity_name/video-chat-app <none> 31cff9189699 3 days ago 179MB
my_registry_com/reposity_name/video-chat-app <none> e162884209fd 3 days ago 179MB
my_registry_com/reposity_name/video-chat-app <none> a37971687a89 4 days ago 179MB
my_registry_com/reposity_name/video-chat-app <none> fb9a11b5a40f 4 days ago 179MB
my_registry_com/reposity_name/video-chat-app <none> 0746e28687e5 4 days ago 179MB
my_registry_com/reposity_name/video-chat-app <none> 8c021e37ffd7 10 days ago 179MB
my_registry_com/reposity_name/video-chat-app <none> f0be13d079af 2 weeks ago 179MB
my_registry_com/reposity_name/video-chat-app <none> 274d8eae34c0 3 weeks ago 179MB
my_registry_com/reposity_name/video-chat-app <none> afdd961b2197 3 weeks ago 179MB
my_registry_com/reposity_name/video-chat-app <none> 03b7fcb66d47 3 weeks ago 179MB
my_registry_com/reposity_name/video-chat-app <none> 8a9ccad05594 3 weeks ago 179MB
my_registry_com/reposity_name/video-chat-app <none> 77c4841c3086 3 weeks ago 179MB
my_registry_com/reposity_name/video-chat-app <none> d6bbf1b09f42 3 weeks ago 179MB
mysql <none> afa411733b0c 5 weeks ago 302MB
mariadb <none> b6184b68d1fd 5 weeks ago 357MB
mariadb 10.5.2 fd055a110f74 5 weeks ago 360MB
kelum_app latest 57296b7b5a4f 5 weeks ago 137MB
kelum_ssl latest cbcbc204c4d6 5 weeks ago 21.7MB
nginx 1.17.9-alpine 377c0837328f 2 months ago 19.7MB
openjdk 8u212-jre-alpine3.9 f7a292bbb70c 12 months ago 84.9MB
[root@host ~]#
Thanks