Update Docker instructions

doc/install.txt

@@ -117,21 +117,24 @@ A contributor made rpm package for Mandriva_ 2010.2 of Theano 0.3.1.
 
 .. _linux_basic:
 
-Docker images
-~~~~~~~~~~~~~
+Docker
+~~~~~~
 
-Builds of Theano are available as `Docker <https://www.docker.com/whatisdocker>`_ images:
-`Theano Docker (CPU) <https://hub.docker.com/r/kaixhin/theano/>`_ or `Theano Docker (CUDA) <https://hub.docker.com/r/kaixhin/cuda-theano/>`_.
-These are updated on a weekly basis with bleeding-edge builds of Theano. Examples of running bash in a Docker container
-are as follows:
+Builds of Theano are available as `Docker <https://www.docker.com>`_
+images: `Theano Docker (CPU) <https://hub.docker.com/r/kaixhin/theano/>`_ or
+`Theano Docker (CUDA) <https://hub.docker.com/r/kaixhin/cuda-theano/>`_. These
+are updated on a weekly basis with bleeding-edge builds of Theano.
+Examples of running bash in a Docker container are as follows:
 
 .. code-block:: bash
 
     sudo docker run -it kaixhin/theano
-    sudo docker run -it --device /dev/nvidiactl --device /dev/nvidia-uvm --device /dev/nvidia0 kaixhin/cuda-theano:7.0
+    sudo nvidia-docker run -it kaixhin/cuda-theano:7.0
 
-For a guide to Docker, see the `official docs <https://docs.docker.com/userguide/>`_. For more details on how to use the
-Theano Docker images, including requirements for CUDA support, consult the `source project <https://github.com/Kaixhin/dockerfiles>`_.
+For a guide to Docker, see the `official docs <https://docs.docker.com>`_.
+CUDA support requires `NVIDIA Docker <https://github.com/NVIDIA/nvidia-docker>`_.
+For more details on how to use the Theano Docker images,
+consult the `source project <https://github.com/Kaixhin/dockerfiles>`_.
 
 Basic user install instructions
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~