Readme: make examples work out of the box

Change-Id: I5131c356d55b6750ac8bcf5dcd7f9360821738f2
diff --git a/README.md b/README.md
index 017e571..9002467 100644
--- a/README.md
+++ b/README.md
@@ -37,13 +37,13 @@
 ### Debugging mode
 
 ```bash
-MOJO_CONFIG=example.conf morbo script/derekovecs-server
+MOJO_CONFIG=$(pwd)/example.conf morbo script/derekovecs-server
 ```
 
 ### Production mode
 
 ```bash
-MOJO_CONFIG=example.conf hypnotoad script/derekovecs-server
+MOJO_CONFIG=$(pwd)/example.conf hypnotoad script/derekovecs-server
 ```
 
 The web user interface will than be available for example at <http://localhost:3000>