Adding ENV to dockerfile for script file customization

docker/Dockerfile

@@ -16,4 +16,5 @@ ENV PATH="$VIRTUAL_ENV/bin:$PATH"
 RUN pip install declearn[all]
 # Create env variables
 # Run script
-CMD ["bash", "experiment/run.sh"]
+ENV script="experiment/run.sh"
+CMD ["bash", ${script}]