You can simply replace the -p 192.168.1.2:5314:5314 with -p 5314:5314.
No need to specify the IP unless your device has multiple (active) network interface and you want to specify which one to use.

You are then able to access by going to localhost:5314.

Additionally, you can skip the docker pull step, when the image is missing the second command will lead to it being pulled automatically.
You should however use it if you want to pull in a newer version of the image.

They split off to be their own little island

Why QEMU? I’ve found it’s performance an compatibility quite lacking compared to VirtualBox, or since you’re using it anyway to run nonfree software: commercial products like VMware Player/Workstation