installation.rst: server docker build instructions (#312)

Author: nirizr

docs/installation.rst

@@ -31,6 +31,15 @@ nginx, mysql, rabbitmq and celery micro components. This makes server
 deployment a lot easier however a docker installation and roughly 1 GB of free
 space is required.
 
+The docker container is not in the docker hub, but the the following docker-compose
+command can be used to build docker inside the rematch repository:
+
+.. code-block:: console
+
+   $ service docker start ;
+   $ docker-compose -f ./server/docker-compose.yml build ;
+   $ docker-compose -f ./server/docker-compose.yml up -d ;
+
 Installing the Rematch IDA Plugin
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