Edited README.md

README.md

@@ -1,5 +1,5 @@
 
-Dockerfile for OpenThread Border Router with MQTT-SN. 
+Dockerfile for [OpenThread Border Router](https://openthread.io/guides/border-router) with [Paho MQTT-SN gateway](https://github.com/eclipse/paho.mqtt-sn.embedded-c). 
 
 
 # Building
@@ -16,7 +16,7 @@ To run the container with the default parameters:
 docker run --name otbr-mqtt-sn -p 8080:80 --dns=127.0.0.1 -it --privileged otbr-mqtt-sn
 ```
 
-The most common network parameters can be set on the docker comman line. The default values are taken from the Nordic Semiconductor border router such that it works with the examples in the [Nordic Semiconductor nRF5 SDK for Thread and Zigbee](https://www.nordicsemi.com/Software-and-tools/Software/nRF5-SDK-for-Thread-and-Zigbee).
+The most common network parameters can be set on the docker comman line. The default values are taken from the [Nordic Semiconductor border router](https://www.nordicsemi.com/Software-and-tools/Software/nRF5-SDK-for-Thread-and-Zigbee/Download#infotabs) such that it works with the examples in the [nRF5 SDK for Thread and Zigbee](https://www.nordicsemi.com/Software-and-tools/Software/nRF5-SDK-for-Thread-and-Zigbee).
 The command line options with default values are shown in the following table.
 
 | Parameter            | command line option             | default value                    |