Dockerfile

...
COPY ./.rc /root/
...
ENV ENV="/root/.rc"
ENTRYPOINT ["/bin/sh"]
...

dockerfile

docker build -t <name>:<tag> <path_dockefile> # build from path with Dockerfile an image

image

docker image ls # list all images in repo
docker images
docker images --filter "dangling=true" # list only "not labelled" images
docker images -f "label!=alpine" # list only "not labelled" images
docker images -f "reference=alpine" -f "before=alpine:latest" # list only "not labelled" images
#-f or --filter format is of "key=value"
#    dangling (boolean - true or false)
#    label (label=<key> or label=<key>=<value>)
#    before (<image-name>[:<tag>], <image id> or <image@digest>)
#    since (<image-name>[:<tag>], <image id> or <image@digest>)
#    reference (pattern of an image reference)

docker image rm <image> .. # delete all docker images in repository
docker rmi $(docker images -f "dangling=true" -q) # delete "dangled" docker images
docker image rmi
docker image rm $(docker images -q) # delete all docker images in repository
docker image prune # delete all unused docker images by containers in repository

docker image tag source_image[:tag] target_image[:new_tag] # Create a tag target_image that refers to source_image
docker tag source_image[:tag] target_image[:new_tag] # Create a tag target_image that refers to source_image

container

docker run -dit -p 8090:80 --name <container> <image> # run detached container with name
docker run --rm  <image> # run ephemeral container & associated volumes

docker container attach <container> # Attach local standard input, output, and error streams to a running container
docker attach <container>

docker commit -a <author> -c <Dockerfile> -m <message> <container> [repository[:tag]] # Create a new image from a container's changes