I had a 2x16GB kit of DDR4 G.Skill memory (Got it on facebook marketplace for $50 CAD) - now I know why it was so cheap. One stick had memtest end with over 10k errors before the first pass finished, tested over 1.5hrs with only the other stick, no issues. Swap in the other stick, instant errors. Down to 16GB, but I'm glad that both weren't bad. Deleted docker image and it is currently re-installing applications.
Also swapped my i3-13100 with an i5-12600k that I grabbed on a boxing day sale for $200 CAD - hopefully the stock i3 intel cooler will suffice for now. Lol.
Thank you for the help JorgeB! Super appreciated. Will report back after docker rebuild is finished, but I'm fairly confident that the issue is resolved.