I was hoping to use the global variables as recommended on the OMV-extras guide for installing Docker like this
THE FOLLOWING VARIABLES CAN BE USED IN ANY COMPOSE FILE
# THEIR VALUE WILL BE REPLACED BY THE VALUE ASSIGNED HERE
# YOU CAN ADD AS MANY VARIABLES AS YOU NEED
#
#
# Customize the PID and GID value of your appuser user.
# You can see it in the OMV GUI in the USERS > USERS tab
#
APPUSER_PUID=1001
APPUSER_PGID=100
#
# Customize your time zone value.
# You can see it in the OMV GUI in the SYSTEM > DATE & TIME tab
#
TIME_ZONE_VALUE=US/Eastern
#
# In this file you can define how many paths you need for different compose files.
# The following are examples corresponding to the example system in the Docker on OMV document on the omv-extras wiki.
# Customize the values according to your system configuration.
#
PATH_TO_APPDATA=/srv/dev-disk-by-uuid-5a4b77fb-1f6f-4315-990e-10ab31bf0f2c/AppData
PATH_TO_DATA=/srv/mergerfs/DataPool/NAS_Folders
PATH_TO_DOCUMENTS=/srv/mergerfs/DataPool/NAS_Folders/User_Docs
PATH_TO_MEDIA=/srv/mergerfs/DataPool/NAS_Folders/Media
PATH_TO_MOVIES=/srv/mergerfs/DataPool/NAS_Folders/Media/Movies
PATH_TO_PHOTOS=/srv/mergerfs/DataPool/NAS_Folders/Media/Photos
PATH_TO_TV=/srv/mergerfs/DataPool/NAS_Folders/Media/TV
PATH_TO_MUSIC=/srv/mergerfs/DataPool/NAS_Folders/Media/Music
PATH_TO_BACKUPS=/srv/dev-disk-by-uuid-384444bb-f020-4492-acd2-5997e908f49f/backups
PATH_TO_DOWNLOADS=/srv/dev-disk-by-uuid-384444bb-f020-4492-acd2-5997e908f49f/downloads
I created the shared folders and used the copy function to set up the global variables
the APPDATA path is the extra drive to isolate Docker from the OS, but based on the example compose file I'm not sure how to implement the global variables
omv 7.5.2-1 sandworm| 64 bit |processor (2) Intel(R) Xeon(R) CPU E5405 @ 2.00GHz | Kernel Linux Linux 6.1.0-30-amd64 | 22G DDR2 ram