Tests

Add some tests to this repository:

• hadolint for Dockerfiles
• shellcheck for bash and sh scripts
• yamllint for YAML files

Currently marking every job with allow_failure: yes, but if this is accepted, I guess the next step would be to fix the "problems" and remove those lines.

deploy/base/ros_entrypoint.bash

@@ -2,5 +2,6 @@
 set -e
 
 # setup application environment
+# shellcheck disable=SC1091
 source "/root/catkin_ws/install/setup.bash"
 exec "$@"