docker-compose up not working if tty-connection not up

[EarlOfBurton]

Hello,
I'm new to docker and containers but pretty happy, thanks to your guides, to get two printers running!

I noticed that when I am "starting" my two octoprint instances via "docker-compose up" they will not start, if there are not active ttyUSB0 (printer 1) and ttyACM0 (printer 2)-connections. They will error and not run.

Is it somehow possible to start anyway (I don't have both printers online all the time)?

The exact error is:

pi@dockerpi:~ $ docker restart octoprint-docker-master_octoprint1_e3v2_1 Error response from daemon: Cannot restart container octoprint-docker-master_octoprint1_e3v2_1: linux runtime spec devices: error gathering device information while adding custom device "/dev/ttyE3V2": no such file or directory

Thanks for your help to a newbie in advance.