[Docker] entrypoint to automatically source setup.bash

This allows
docker run --rm --net=host --runtime=nvidia -e DISPLAY -it talos-integration-tests:18.04 rostest talos_integration_tests test_kine.test

Dockerfile

@@ -44,3 +44,6 @@ RUN rosdep init \
 ADD . /ws/src/talos_integration_tests
 RUN catkin config --install \
  && catkin build talos_integration_tests
+
+ENTRYPOINT ["/ws/src/talos_integration_tests/entrypoint.sh"]
+CMD ["/bin/bash"]

README.md

@@ -76,7 +76,6 @@ docker run --rm --net=host --runtime=nvidia -e DISPLAY -it talos-integration-tes
 
 Once in the container:
 ```
-source install/setup.bash
 rostest talos_integration_tests test_kine.test
 rostest talos_integration_tests test_sot_talos_balance.test
 ```

entrypoint.sh

+#!/bin/bash
+set -e
+source /ws/install/setup.bash
+exec "$@"