The syslog in your diagnostics is just after reboot.
Go to Settings - Syslog Server and configure it so you can retain syslogs to try to capture more information before crash.
Some other things I noticed, though unlikely to be the cause of crash.
Why do you have 64G allocated for docker image? Have you had problems filling it? 20G should be more than enough and if it isn't you have one or more of your docker apps misconfigured. See below for more on this***
Your system and appdata shares have files on the array. This will impact the performance of your dockers. They should be cache-only or prefer, with no files on the array.
***In addition to misconfigured dockers filling docker image, it is also possible for them to fill memory, which could cause a crash.
A docker application will fill docker image if it writes to a path that isn't mapped to Unraid storage.
A docker application will fill memory if it is mapped to a path that is not actual storage since all other paths are in RAM.