Merge pull request #18 from deephdc/ignacio-br0

update metadata docs

source/user/howto/add-to-DEEP-marketplace.rst

@@ -26,7 +26,7 @@ This is the repo containing the code of your model. If you are adding a service
 The Docker repo
 ^^^^^^^^^^^^^^^
 
-This repo has to contain at least the following files:
+This repo has to contain at least the following files (see the `Generic container <https://github.com/deephdc/DEEP-OC-generic-container>`_ for a template):
 
 * ``Dockerfile``
 
@@ -43,6 +43,12 @@ This repo has to contain at least the following files:
 * ``metadata.json``
 
    This file contains the information that is going to be displayed in the Marketplace. You can build your own starting from this `metadata.json example <https://github.com/deephdc/DEEP-OC-plants-classification-tf/blob/master/metadata.json>`_
+   This metadata will be validated during integration tests when the PR is accepted but you can manually `validate the metadata <https://github.com/deephdc/schema4deep>`_  beforehand by running:
+
+   .. code-block:: console
+
+    pip install git+https://github.com/deephdc/schema4apps
+    deep-app-schema-validator metadata.json
 
 Making the Pull Request
 -----------------------