I use the latest docker-image and while starting it up I get the following message:
Image mounting disabled: TEST FAILED: guestmount is missing (libguestfs-tools)
can I do anything about this or is this intentionally ?
I do not want to apt-install it by hand because with an update it’d be gone 
Perhaps it’s just missing in the build ?
I get the error in
uroni/urbackup-server:latest-zfs
sha256:b2d139b48f985eb71779f1c740ebb1fe009fcccb366a2cb12f7ab834582ab513
and
uroni/urbackup-server:latest
sha256:29cf74482d2de8781e41384464b5a9884e57b881203dc14e7718f24b44e517fe