docker image mesosphere/marathon-lb:latest problems when running with different user

[f1-outsourcing]

Got this error running with nobody (root is not a problem)

[WARN  tini (315335)] Tini is not running as PID 1 and isn't registered as a child subreaper.
Zombie processes will not be re-parented to Tini, so zombie reaping won't work.
To fix the problem, use the -s option or set the environment variable TINI_SUBREAPER to register Tini as a child subreaper, or run Tini as PID 1.
mkdir: cannot create directory '/marathon-lb/service/lb': Permission denied
I0716 14:10:43.008098 315304 executor.cpp:1013] Command exited with status 1 (pid: 315335)
I0716 14:10:44.009593 315334 process.cpp:927] Stopped the socket accept loop