add nightly

Signed-off-by: Christian Richter <crichter@owncloud.com>

motsognir/README.md

@@ -4,16 +4,16 @@ A container for the motsognir gopher server http://motsognir.sourceforge.net/
 
 ## Running locally
 
-**amd64**
+**x86_64**
 
 ```
-$> docker run -p 70:70 -v /path/to/you/local/gopherfolder:/gopher dragonchaser/motsognir:latest-amd64 
+$> docker run -p 70:70 -v /path/to/you/local/gopherfolder:/gopher dragonchaser/motsognir:latest 
 ```
 
-**arm64**
+**arm32v7**
 
 ```
-$> docker run -p 70:70 -v /path/to/you/local/gopherfolder:/gopher dragonchaser/motsognir:latest-arm64
+$> docker run -p 70:70 -v /path/to/you/local/gopherfolder:/gopher dragonchaser/motsognir:latest-arm32v7 
 ```
 
 **Notes:**