chore: fix build dockerfile

Dockerfile

@@ -1,4 +1,5 @@
-FROM ghcr.io/greenroom-robotics/ros_builder:iron-latest
+ARG ROS_DISTRO=iron
+FROM ghcr.io/greenroom-robotics/ros_builder:${ROS_DISTRO}-latest
 
 # Create the package_manifests by deleting everything other than package.xml
 WORKDIR /package_manifests
@@ -41,4 +42,4 @@ RUN sudo chown -R ros:ros /home/ros/${PLATFORM_MODULE}
 # ENV ROS_OVERLAY /opt/greenroom/${PLATFORM_MODULE}
 # RUN echo 'source ${ROS_OVERLAY}/setup.sh' >> ~/.profile
 
-CMD tail -f /dev/null
+CMD tail -f /dev/null