I'm now successfully running WebMMEX 1.2.3 on a Raspberry Pi Model 3 B+ with Raspberry Pi OS Lite (Bookworm, 32-bit) using Docker, along with NGINX and Let's Encrypt SSL for security. Everything is working smoothly.
I can share my step-by-step guide, but I don't see an easy way to post it directly here. I also don’t have a personal website or a GitHub account.
If anyone is interested, feel free to PM me, and I can email you a copy.