Add some og image to dev docs

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Paulus Schoutsen 2017-07-25 23:21:45 -07:00 committed by Fabian Affolter
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commit d63a638a8c
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@ -7,6 +7,7 @@ sidebar: true
comments: false
sharing: true
footer: true
og_image: /images/architecture/component_interaction.png
---
Home Assistant can be extended with **components**. Each component is responsible for a specific domain within Home Assistant. Components can listen for or trigger events, offer services, and maintain states. Components are written in Python and can do all the goodness that Python has to offer. Out of the box, Home Assistant offers a bunch of [built-in components]({{site_root}}/components/).