DOC: Document the Docker image

Documentation/Cookbook/rst/Installation.rst

@@ -32,6 +32,29 @@ MacOS X
 
 .. include:: Installation_Macos.rst
 
+Docker image
+------------
+
+A Docker image is available on `DockerHub <https://hub.docker.com/r/orfeotoolbox/otb>`__. It
+can be used on any device running Docker, and provides python 3.8.
+
+::
+
+    docker pull orfeotoolbox/otb
+
+To run CLI tools, you can launch the docker image with:
+
+::
+   
+    docker run -it orfeotoolbox/otb
+
+If you are planning on using the GUI applications, you have to call
+docker with the following arguments:
+
+::
+   
+    docker run -it -e DISPLAY=$DISPLAY -v /tmp/.X11-unix/:/tmp/.X11-unix/ --device=/dev/dri:/dev/dri orfeotoolbox/otb monteverdi
+
 
 Conda package
 -------------

Documentation/Cookbook/rst/Installation_Macos.rst

 We provide for MacOS X through a standalone package. This package is a
-self-extractible archive, quite similar to the Linux one. You may
-uncompress it with the command line:
+self-extractible archive, quite similar to the Linux one.
+
+This package was compiled using an Intel processor, and won't be
+compatible with ARM processors found in the most recent MacOS
+computers. If you want to use OTB on such a device, we recommend using
+the Docker image (see below).
+
+You may uncompress it with the command line:
 
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