Update README.md

README.md

 # Xcache @ LRZ
 
-This repo tracks the definition file of the singularity container for the xcache image used at LRZ in Munich. It's based on Wei's instructions on github:
+This repo tracks the definition file of the singularity container and additional configuration for the xcache image used at LRZ in Munich. It's based on Wei's instructions on github:
 
 https://github.com/wyang007/rucioN2N-for-Xcache