Add docker setup

README.rst

@@ -71,6 +71,26 @@ the checked-out version available at ``src/cpulimit``::
   $ ln -s ../src/cpulimit/src/cpulimit
   $ cd .. #go back to the root of beat.web
 
+Docker Setup
+============
+
+Make sure you have the ``docker`` command available on your system. For certain
+operating systems, it is necessary to install ``docker`` via an external
+virtual machine (a.k.a. the *docker machine*). Follow the instructions at `the
+docker website <https://docs.docker.com/engine/installation/>` before trying to
+execute algorithms or experiments.
+
+We use specific docker images to run user algorithms. Download the following
+base images before you try to run tests or experiments on your computer::
+
+  $ docker pull beats/py27:system
+
+Optionally, also download the following images to be able to re-run experiments
+downloaded from the BEAT platform (not required for unit testing)::
+
+  $ docker pull beats/py27:0.0.4
+  $ docker pull beats/py27:0.1.0
+
 
 Documentation
 -------------