I am asking here how to write a comment in a dockerfile. So I need to be clear that I am not talking about writing
#This is a comment
into a dockerfile.
What I am looking for is how to set the comment field in the detailed description.
docker inspect ubuntu -f {{.Comment}}
docker inspect ubuntu
with either of these two commands you can see a comment entry in the detailed description. The current ubuntu container has an empty comment.
I checked the builder reference and did not find anything about it.
I googled and stack-overflowed - unfortunately the keyword "comment" leads the search towards how to use #comment which is not what I am after.
My question is how can I populate a comment field in the detailed description?
Use docker commit command. See docs here:
$ docker pull nginx
$ docker image inspect -f {{.Comment}} nginx
$ docker run -d --name mycontainer nginx
$ docker commit -m "my comment" mycontainer nginx
$ docker image inspect -f {{.Comment}} nginx
my comment