docs: Update README

docker/README.rst

@@ -6,9 +6,10 @@ Build Docker image
 
 In order to build OST image:
 
-.. code-block::
-    cd <OST ROOT>/docker
-    (sudo) docker build --tag <TAG> .
+.. code-block:: bash
+
+  cd <OST ROOT>/docker
+  (sudo) docker build --tag <TAG> .
 
 One can chose any tag eg. ost.
 
@@ -17,14 +18,16 @@ Run script with OST
 
 In order to run OST script do:
 
-.. code-block::
-    (sudo) docker run --rm -v <PATH TO SCRIPT DIR>:/home <IMAGE NAME> /home/<SCRIPT NAME> [OPTIONS]
+.. code-block:: bash
+
+  (sudo) docker run --rm -v <PATH TO SCRIPT DIR>:/home <IMAGE NAME> /home/<SCRIPT NAME> [OPTIONS]
 
 Run GUI
 -------
 
 In order to run GUI do (tested on linux machine):
 
-.. code-block::
-    xhost +local:docker
-    (sudo) docker run -ti --rm -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix --entrypoint dng <IMAGE NAME>
+.. code-block:: bash
+
+  xhost +local:docker
+  (sudo) docker run -ti --rm -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix --entrypoint dng <IMAGE NAME>