📄 Document installation and usage

README.md

@@ -1,6 +1,21 @@
-# Datadog via API integration for Home Assistant
+# Datadog Agentless integration for Home Assistant
 
 This integration is sending metrics and events from Home Assistant to Datadog.
 As opposed to the official datadog integration, it contacts the datadog api directly, which removes the need to run a datadog agent along side HA.
 
 The code is a fork of https://github.com/tjschiffer/hassio-addons 🙇.
+
+
+## Installation
+
+Installation is done through hacs (pending integration in default repository, the installation can be done as a custom repository).
+
+## Configuration
+
+Add a new integration "datadog-agentless". You'll be asked to give an API key and the site (datadoghq.com or datadoghq.eu for instance).
+
+## Usage
+
+This integration does not expose any sensor at the moment. It sends metrics to datadog under the prefix `hass` for instance `hass.sensor`.
+
+It adds a few tags such as `service:home-assistant` and `version:<your ha version>`.