It isn't possible to tail a named pipe

If you try to tail a named pipe:
~~~bash
% mkfifo /tmp/fifo
% cat <<EOF > /tmp/test.sh
#!/bin/bash

echo "this is going to the fifo" > /tmp/fifo
sleep 5
echo "from exec stdout"
EOF
% chmod +x /tmp/test.sh
% dockerize --stdout /tmp/fifo /tmp/test.sh
from exec stdout
2017/12/14 14:02:32 Command finished successfully.
~~~

Nothing is printed coming from the named pipe in question.

