Looking at the dockerfile there are 2 volumes that are being used:
/var/www/app/include
/var/www/app/filestore
Do you have those 2 mapped to your local shared folders on your NAS?
'm new to this area so I'm not exactly sure how to connect to the Docker container via SSH
Depending on your OS of choice it will depend. If you are on a Mac or Linux you can use Terminal app to connect to your NAS via ssh or using PUTTY if you are on Windows.
In any case, check to see if ssh is open on your NAS and if not enable it (Control Panel > Terminal and SNMP; in there tick the checkbox for ssh and click apply).
Now you can use this one line to connect to your NAS via ssh:
ssh your_nas_account@you_nas_IP_address
After that, you will be asked for your password, enter it and you are done!
In order to use docker commands now, you will need to elevate to root access. BE CAREFUL WHAT YOU ARE DOING FROM THIS POINT!
To elevate to root use this command:
sudo -i
and hit return. Enter your initial user password again when prompted and your command prompt should be root.
Now docker command that will inspect your running container and list all the settings in a JSON file/view is
docker inspect NAME_OF_YOUR_CONTAINER
.
When you get your data listed then your can search for volume sections and see all the paths that this container is using (internally and mapped outside to a folder on your NAS).