docs(tools): add backstage

radar/2022-03-28/backstage.md

@@ -0,0 +1,15 @@
+---
+title:      "backstage"
+ring:       assess
+quadrant:   tools
+---
+
+We see a lot of clustering in teams, microservices, libraries, and so on. We think a centralized software catalog
+like [Backstage](https://backstage.io/) can help use to get a clearer view of our stack and the dependencies of a
+platform.
+It also helps to get the information and documentation you need as a developer more quickly.
+
+Backstage is an open-source developer portal platform created by Spotify. There is a very active community around it
+with already a lot of plugins for integrations with other tools, ci, monitoring and so on.
+
+At AOE we assess backstage in a big project with a subset of features.