Add Docker container

[2b-t]

This pull request adds a Dockerfile for running Allan Variance ROS from a Docker container. This is in particular useful when using this tool in ROS 2. For this purpose a ROS 2 bag has to be converted to a ROS 1 bag e.g. using rosbags-convert similar to kalibr. Then one can add an additional volume for the recorded IMU data inside the docker/docker-compose.yml and run Allan Variance ROS from inside the container. In the process I also added some missing Python3 dependencies to the package.xml.