Update the installation instructions.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

docs/topics/installation.rst

@@ -2,7 +2,7 @@ Installation
 ============
 
 The easiest way to use Mayan EDMS is by using the official Docker_ image.
-Make sure Docker_ is properly installed and working before attempting to install
+Make sure Docker is properly installed and working before attempting to install
 Mayan EDMS.
 
 With Docker properly installed, proceed to download the Mayan EDMS image using
@@ -10,102 +10,25 @@ the command:
 
 .. code-block:: bash
 
-    docker pull mayanedms/mayanedms
+    $ docker pull mayanedms/mayanedms:2.3
 
 After the image finishes downloading, initialize a Mayan EDMS container.
 
 .. code-block:: bash
 
-    docker run --rm -v mayan_media:/var/lib/mayan \
-    -v mayan_settings:/etc/mayan mayanedms/mayanedms mayan:init
+    $ docker run -d --name mayan-edms --restart=always -p 80:80 \
+    -v mayan_data:/var/lib/mayan mayanedms/mayanedms
 
-With initialization complete, launch the container. If another web server is
-running on port 80 use a different port in the -p option, ie: -p 81:80.
+Point your browser to the IP address 127.0.0.1 (or the alternate port chosen,
+ie: 127.0.0.1:81) and use the automatically created admin account.
 
-.. code-block:: bash
+All files will be stored in the Docker volume ``mayan_data``
 
-    docker run -d --name mayan-edms --restart=always -p 80:80 \
-    -v mayan_media:/var/lib/mayan -v mayan_settings:/etc/mayan \
-    mayanedms/mayanedms
-
-Point your browser to 127.0.0.1 (or the alternate port chosen, ie: 127.0.0.1:81)
-and use the automatically created admin account.
-
-All files will be stored in the following two volumes:
-
-- mayan_media
-- mayan_settings
-
-Stopping and starting
----------------------
-To stop the container use::
-
-    docker stop mayan-edms
-
-To start the container again::
-
-    docker start mayan-edms
-
-Configuring
------------
-To edit the settings file, check the physical location of the `mayan_settings`
-volume using::
-
-    docker volume inspect mayan_settings
-
-Which should produce an output similar to this one:
-
-.. code-block:: bash
-
-    [
-        {
-            "Name": "mayan_settings",
-            "Driver": "local",
-            "Mountpoint": "/var/lib/docker/volumes/mayan_settings/_data",
-            "Labels": null,
-            "Scope": "local"
-        }
-    ]
-
-In this case the physical location of the `mayan_settings` volume is
-`/var/lib/docker/volumes/mayan_settings/_data`. Edit the settings file with your
-favorite editor::
-
-    sudo vi /var/lib/docker/volumes/mayan_settings/_data/local.py
-
-Backups
--------
-
-To backup the existing data, check the physical location of the `mayan_media`
-volume using::
-
-    docker volume inspect mayan_media
-
-Which should produce an output similar to this one:
-
-.. code-block:: bash
-
-    [
-        {
-            "Name": "mayan_settings",
-            "Driver": "local",
-            "Mountpoint": "/var/lib/docker/volumes/mayan_media/_data",
-            "Labels": null,
-            "Scope": "local"
-        }
-    ]
-
-Only the `db.sqlite3` file and the `document_storage` folder need to be backed
-up::
-
-    sudo tar -zcvf backup.tar.gz /var/lib/docker/volumes/mayan_media/_data/document_storage /var/lib/docker/volumes/mayan_media/_data/db.sqlite3
-    sudo chown `whoami` backup.tar.gz
-
-Restore
--------
-Uncompress the archive in the original docker volume using::
-
-    sudo tar -xvzf backup.tar.gz -C /
+If another web server is running on port 80 use a different port in the ``-p``
+option, ie: ``-p 81:80``.
 
+For the complete set of installation, configuration, upgrade, and backup
+instructions visit the Mayan EDMS Docker Hub page at:
+https://hub.docker.com/r/mayanedms/mayanedms/
 
 .. _Docker: https://www.docker.com/