Fix readme regarding indexer configuration

Change-Id: I4afe43dd4378e654f745e94a3e254a51794bd9c7
diff --git a/Readme.md b/Readme.md
index bb43f96..1cf109b 100644
--- a/Readme.md
+++ b/Readme.md
@@ -131,7 +131,7 @@
 ```shell
 $ mkdir index
 $ docker run -u root --rm -v ${PWD}:/data:z korap/kustvakt \
-  Krill-Indexer.jar -c kustvakt-lite.conf \
+  Krill-Indexer.jar -c /kustvakt/kustvakt-lite.conf \
   -i /data/json -o /data/index/
 ```