Update code indentation in rst files

doc/getstarted/build_and_install/docker_install_en.rst

@@ -41,6 +41,7 @@ Windows -- in a consistent way.
    runs the image:
 
    .. code-block:: bash
+
       docker run -d -p 2202:22 -v $PWD:/paddle paddle:dev
 
    This runs a container of the development environment Docker image
@@ -53,12 +54,14 @@ Windows -- in a consistent way.
    this container with:
 
    .. code-block:: bash
+
       ssh root@localhost -p 2202
 
    Usually, I run above commands on my Mac.  I can also run them on a
    GPU server :code:`xxx.yyy.zzz.www` and ssh from my Mac to it:
 
    .. code-block:: bash
+
       my-mac$ ssh root@xxx.yyy.zzz.www -p 2202
 
 1. Build and Install Using the Development Environment
@@ -68,12 +71,14 @@ Windows -- in a consistent way.
    Paddle:
 
    .. code-block:: bash
+
       /paddle/paddle/scripts/docker/build.sh
 
    This builds everything about Paddle in :code:`/paddle/build`.  And
    we can run unit tests there:
 
    .. code-block:: bash
+
       cd /paddle/build
       ctest