update provider list, add tun/tap info

README.md

@@ -54,7 +54,7 @@ By default a folder named transmission-home will also be created under /data, th
 ### Required environment options
 | Variable | Function | Example |
 |----------|----------|-------|
-|`OPENVPN_PROVIDER` | Sets the OpenVPN provider to use. | `OPENVPN_PROVIDER=provider`. Supported providers are `PIA`, `BTGUARD`, `TIGER`, `FROOT`, `TORGUARD`, `NEWSHOSTING`, `NORDVPN`, `USENETSERVER`, `INTEGRITYVPN`, `IPVANISH`, `ANONINE`, `HIDEME`, `PUREVPN`, `HIDEMYASS`, `PRIVATEVPN`, `IVPN`, `OVPN`, `IVACY` and `CRYPTOSTORM`|
+|`OPENVPN_PROVIDER` | Sets the OpenVPN provider to use. | `OPENVPN_PROVIDER=provider`. Supported providers are `PIA`, `BTGUARD`, `TIGER`, `FROOT`, `TORGUARD`, `NEWSHOSTING`, `NORDVPN`, `USENETSERVER`, `INTEGRITYVPN`, `IPVANISH`, `ANONINE`, `HIDEME`, `PUREVPN`, `HIDEMYASS`, `PRIVATEVPN`, `IVPN`, `OVPN`, `SLICKVPN`, `IVACY` and `CRYPTOSTORM`|
 |`OPENVPN_USERNAME`|Your OpenVPN username |`OPENVPN_USERNAME=asdf`|
 |`OPENVPN_PASSWORD`|Your OpenVPN password |`OPENVPN_PASSWORD=asdf`|
 
@@ -130,6 +130,9 @@ For example use googles dns servers by adding --dns 8.8.8.8 --dns 8.8.4.4 as par
 #### Restart container if connection is lost
 If the VPN connection fails or the container for any other reason loses connectivity, you want it to recover from it. One way of doing this is to set environment variable `OPENVPN_OPTS=--inactive 3600 --ping 10 --ping-exit 60` and use the --restart=always flag when starting the container. This way OpenVPN will exit if ping fails over a period of time which will stop the container and then the Docker deamon will restart it.
 
+### Running it on a NAS
+Several popular NAS platforms supports Docker containers. You should be able to set up and configure this container using their web interfaces. Remember that you need a TUN/TAP device to run the container. To set up the device it's probably simplest to install a OpenVPN package for the NAS. This should set up the device. If not, there are some more detailed instructions below.
+
 #### Questions?
 If you are having issues with this container please submit an issue on GitHub.
 Please provide logs, docker version and other information that can simplify reproducing the issue.