#!/bin/bash
# get the image name from the current working directory
IMG_NAME=$(basename $(pwd))

# create a random container name and use throuout this scrip
CNTR=$(date | md5sum | head -c 10)


docker build -t $IMG_NAME .

# create container without running it
docker create --name $CNTR $IMG_NAME
# copy the file to working directory of the host
docker cp $CNTR:/mydata/greetings.txt .
# remove container again
docker rm $CNTR

# now list new file
ls -l greetings.txt