ci: init or update documentation

README.adoc

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+= Gravitee-io - Node
+
+image:https://img.shields.io/badge/License-Apache%202.0-blue.svg["License", link="https://github.com/gravitee-io/graviteeio-node/blob/master/LICENSE.txt"]
+image:https://img.shields.io/badge/semantic--release-conventional%20commits-e10079?logo=semantic-release["Releases", link="https://github.com/gravitee-io/graviteeio-node/releases"]
+image:https://circleci.com/gh/gravitee-io/gravitee-node.svg?style=svg["CircleCI", link="https://circleci.com/gh/gravitee-io/gravitee-node"]
+image:https://f.hubspotusercontent40.net/hubfs/7600448/gravitee-github-button.jpg["Join the community forum", link="https://community.gravitee.io?utm_source=readme", height=20]
+
+
+== Description
+The Gravitee.io node project is the cornerstone of every Gravitee.io products.
+
+TO BE COMPLETED...