dockerfiles: Provide setups for some scenarios

[anselmolsm]

Dockerfiles can be used to create docker images with dependencies of certain project pre-installed, for example. Basic ROS configuration is an example of useful dockerfile to have.

We'll setup a separate repo for those files (and put the link here when it's ready).

[shakthi-prashanth-m]

@anselmolsm: While docker pull ros works well, am interested to know how does having Dockerfile for ROS is different ? Projects that use ROS may provide Dockerfile to build it using docker.

[anselmolsm]

@shakthi-prashanth-m a Dockerfile can contain list of steps needed to install and configure certain application dependencies, for example. It's simpler to tell people to run docker build instead of a list of steps.