Simplify and debloat running docker container

Change-Id: I74f467694f1c6f5b75564ce546fae31b34b50d8f
diff --git a/Dockerfile b/Dockerfile
index 3adc1c6..93f9a07 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -47,6 +47,7 @@
     make && \
     make install
 
+RUN rm -rf example-models
 
 ENV MOJO_CONFIG=/config/derekovecs.conf