[Suggestion] NixOS Firewall Troubleshooting

Small suggestion, but I noticed for running the Docker container from NixOS, I had to change my NixOS configuration to remove `networking.firewall.enable = false;` and then rebuild. After doing so, my AP was able to distribute an IP address to my phone and I was able to flash. It might be worth noting this along with the lsof command to check for other services such as systemd taking up needed ports.

Start by locating the existing Docker/NixOS troubleshooting guidance and the section that uses lsof to inspect port conflicts; no documentation file is named in the issue. Done means the guidance mentions the NixOS firewall setting and rebuilding after changing it, alongside checking services such as systemd.

Written by the indexing model from the issue text.