$ docker build -t hello_world .
Sending build context to Docker daemon 931.3 kB
Sending build context to Docker daemon
Step 0 : FROM scratch
 --->
Step 1 : ADD hi /hi
 ---> 2fe834f724f8
Removing intermediate container 01f73ea277fb
Step 2 : ENTRYPOINT /hi
 ---> Running in 045e32673c7f
 ---> 5f8802ae5443
Removing intermediate container 045e32673c7f
Successfully built 5f8802ae5443
$ docker run hello_world
Hello world!
$ docker images | grep hello_world
hello_world      latest    5f8802ae5443   24 seconds ago  928.3 kB
