Docker doc update

Author: Hanbin Hu

docs/docker.rst

@@ -0,0 +1,50 @@
+Bluefog Docker Usage
+=============================
+
+1. Build docker image with CUDA support:
+
+.. code-block:: bash
+
+    sudo docker build -t bluefog_gpu . -f dockerfile.gpu
+
+2. Build docker image with only CPU support:
+
+.. code-block:: bash
+
+    sudo docker build -t bluefog_cpu . -f dockerfile.cpu
+
+1. Run docker container with CUDA support:
+
+.. code-block:: bash
+
+    sudo docker run --privileged -it --gpus all --name bluefog_gpu_deploy --network=host -v /mnt/share/ssh:/root/.ssh bluefog_gpu:latest
+
+2. Run docker container with only CPU support:
+
+.. code-block:: bash
+
+    sudo docker run --privileged -it --name bluefog_cpu_deploy --network=host -v /mnt/share/ssh:/root/.ssh bluefog_cpu:latest
+
+3. Close docker container with CUDA support:
+
+.. code-block:: bash
+
+    sudo docker container rm bluefog_gpu_deploy
+
+4. Close docker container with only CPU support:
+
+.. code-block:: bash
+
+    sudo docker container rm bluefog_cpu_deploy
+
+1. UnitTest in docker container
+
+.. code-block:: bash
+
+    bfrun -np 4 pytest -s torch_ops_test.py
+
+2. Examples in docker container
+
+.. code-block:: bash
+
+    bfrun -np 4 python pytorch_average_consensus.py

docs/index.rst

@@ -139,6 +139,7 @@ algorithm, please read our :ref:`Ops Explanation` page.
 
    Bluefog Ops Explanation <bluefog_ops>
    Lauching Application Through bfrun <running>
+   Bluefog Docker Usage <docker>
    Bluefog Perform Comparison <performance>
    Bluefog Rationale <rationale>
    Bluefog Timeline <timeline>
@@ -147,4 +148,4 @@ algorithm, please read our :ref:`Ops Explanation` page.
    Development Guide <devel_guide>
 
 .. _openmpi: https://www.open-mpi.org/
-.. _examples: https://github.com/ybc1991/bluefog/tree/master/examples
+.. _examples: https://github.com/ybc1991/bluefog/tree/master/examples