d2vm: add version command, lookup mbr.bin in well-known paths

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

examples/full/Dockerfile

@@ -20,6 +20,7 @@ ARG SSH_KEY=https://github.com/${USER}.keys
 
 # Setup user environment
 RUN DEBIAN_FRONTEND=noninteractive apt install -y \
+      bash-completion \
       curl \
       zsh \
       git \