In the documentation was not mentioned explicitly that VOLUME value shoud be a valid JSON array. Because of this I spent time to discovering the problem with my image where I put `VOLUME ['/data']` (with single quotes). The `['/data']` mount point was parsed and mounted whole as a string without any errors and warnings. Docker-DCO-1.1-Signed-off-by: Max Shytikov <mshytikov@gmail.com> (github: mshytikov)