use COPY instead of git clone, this provides better support for developer workflows
add .dockerignore to avoid copying IDE artifacts into the docker images
fix usage of the ROS_DISTRO ARG. This appeared to be working before because the upstream osrf image set the ROS_DISTRO env var in the image, but it was confusing.
I re-tested the 'core 4' launch files in Foxy, Galactic and Rolling.
@jbohren @wep21 Sorry for the late PR and extra work.
I re-tested the 'core 4' launch files in Foxy, Galactic and Rolling.
@jbohren @wep21 Sorry for the late PR and extra work.