how to clear docker unnecessary resources to give more space for memories, like unnecessary containers, unnecessary images, volumes,etc.
- Check the docker used resources.
docker container ls：Default list containers，-a Show all containers (default shows just running)
docker image ls：Show all images (default hides intermediate images)
docker volume ls：Show all volumes.
docker network ls：Show network.
docker info：Display system-wide information.
$ docker system prune
if you wanna remove specific volumns
$ docker system prune --all --force --volumns
