Added README for Docker

README-Docker.rst

+==================================
+eduGAIN Connectivity Check Service
+==================================
+
+Indice
+------
+
+#. `Base`_
+#. `Setup dev environment`_
+#. `Authors`_
+
+Base
+----
+
+#. Install `Docker`_
+#. Follow Linux `post-installation`_ steps for Docker Engine.
+
+Setup dev environment
+---------------------
+
+#. Install GIT:
+
+   * ``sudo apt install git``
+
+#. Clone the ECCS repository:
+
+   * ``git clone git@gitlab.software.geant.org:edugain/eccs.git $HOME/eccs``
+
+
+Authors
+-------
+
+* `Marco Malavolti`_
+* `Valentin Pocotilenco`_
+
+.. _post-installation: https://docs.docker.com/engine/install/linux-postinstall/
+.. _Docker: https://docs.docker.com/engine/install/ 
+.. _Marco Malavolti: mailto:marco.malavolti@garr.it
+.. _Valentin Pocotilenco: mailto:valentin.pocotilenco@renam.md