docker restart container failed: "already in use", but there's no more docker image

It is because

You find it stopped

docker ps -a

You can simply start it using below command:

docker start webserver

EDIT: Alternatives If you want to start the container with below command each time,

docker run -d -p 80:80 --name webserver nginx

then use one of the following:

method 1: use --rm switch i.e., container gets destroyed automatically as soon as it is stopped

docker run -d -p 80:80 --rm --name webserver nginx

method 2: remove it explicitly after stopping the container before starting the command that you are currently using.

docker stop <container name>
docker rm <container name>

As the error says.

You have to remove (or rename) that container to be able to reuse that name

This leaves you two options.

You may delete the container that is using the name "webserver" using the command

docker rm 036a0bcd196c5b23431dcd9876cac62082063bf62a492145dd8a55141f4dfd74

and retry.

Or you may use a different name during the run command. This is not recommended, as you no longer need that docker.

It's better to remove the unwanted docker and reuse the name.

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