fix: [install] bailout if ``docker-host`` script failed

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

bin/myc-install

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 ## Installing base docker-host
-wget http://docker.0k.io/get/ -qO - | bash
+wget http://docker.0k.io/get/ -qO - | bash || exit 1
 
 ## shlib is now available
 . /etc/shlib || {