Devcontainer Debug fix for IP/host in Ubuntu

[hubmartin]

Hi,
in devcontainer in Ubuntu and Docker combo I had to change this to get debugging running:

I launch.json i changed IP address to my own
"gdbTarget": "192.168.1.40:3333",

And you need to add bindto command so openocd will listen not only on localhost

openocd -f interface/stlink.cfg -f target/nrf52.cfg -c 'bindto 0.0.0.0'
(I would add this example to readme of devcontainer, because stlink/nrf52 will be the most used combination I guess)

And then I needed to add firewall rule

sudo ufw allow 3333

Devcontainer is working perfectly. Thanks for this improvment to everyone who helped with it.

FIY @geekbozu