Link subdomain to docker (NGINX)
This section assumes an NGINX docker and you have setup your DNS to connect to you NAS via a wildcard.
1) Enable Telnet on the NAS in Control Panel
2) Telnet into the NAS, I prefer putty
3) cd into the folder you can easily access or edit (in my case, a network shared folder, execute, in the terminal screen "docker ps" to find the id of your container
docker ps
docker cp c0568abcdb83916:/etc/nginx/nginx.conf tmp_tim.conf
then edit, the config file for nginx, and do the reverse:
docker cp tmp_tim.conf c0568abcdb83916:/etc/nginx/nginx.conf
Restart the container.