Create a Dockerfile that defines a container that, when run, uses the cowsay application to print the contents of an environment variable called COWSAY_TEXT.
Cowsay is easy to use. When it is run, it will print out any arguments passed to it in a fun speech bubble above a cow. See below.
➜ cowsay I am a cow and I say things
_____________________________
< I am a cow and I say things >
-----------------------------
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||Important Note: In order to run cowsay in an Ubuntu container you need to specify the full path to the executable, which is /usr/games/cowsay. This is because /usr/games isn’t in the PATH in the Ubuntu container image. This is probably to simplify the image.