Add documentation section about the project structure (#2880)

docs/overview/support.md

@@ -1,19 +0,0 @@
----
-id: support
-title: Support and community
-description: Support and Community Details and Links
----
-
-- [Discord chatroom](https://discord.gg/MUpMjP2) - Get support or discuss the
-  project
-- [Good First Issues](https://github.com/spotify/backstage/contribute) - Start
-  here if you want to contribute
-- [RFCs](https://github.com/spotify/backstage/labels/rfc) - Help shape the
-  technical direction
-- [FAQ](../FAQ.md) - Frequently Asked Questions
-- [Code of Conduct](../../CODE_OF_CONDUCT.md) - This is how we roll
-- [Blog](https://backstage.io/blog/) - Announcements and updates
-- [Newsletter](https://mailchi.mp/spotify/backstage-community) - Subscribe to
-  our email newsletter
-- Give us a star ⭐️ - If you are using Backstage or think it is an interesting
-  project, we would love a star ❤️