Bugs

Follow the tutorial in the README to create config.json and the rootfs. Then change process in config.json to sleep 1000, etc., and execute the following commands.

$ sudo ./youki create -b tutorial tutorial_container
$ sudo ./youki start tutorial_container 
$ sudo ./youki exec tutorial_container non-exist-command
$ echo $?
0

Expected behavior

echo $? should return the failure exit code.

Goal

Pass the integration test TestContainerExecNoBinaryExists in contianerd.
related: #531