(docs) Add Netflix DGS to java-server

Author: setchy

src/content/code/language-support/java-kotlin-android/server/netflix-dgs.md

@@ -0,0 +1,23 @@
+---
+name: Domain Graph Service (DFS) Framework
+description: The DGS Framework (Domain Graph Service) is a GraphQL server framework for Spring Boot, developed by Netflix.
+url: https://netflix.github.io/dgs/
+github: netflix/dgs-framework
+---
+
+The DGS Framework (Domain Graph Service) is a GraphQL server framework for Spring Boot, developed by Netflix.
+
+
+Features include:
+
+* Annotation based Spring Boot programming model
+* Test framework for writing query tests as unit tests
+* Gradle Code Generation plugin to create types from schema
+* Easy integration with GraphQL Federation
+* Integration with Spring Security
+* GraphQL subscriptions (WebSockets and SSE)
+* File uploads
+* Error handling
+* Many extension points
+
+See [DGS Framework Getting Started](https://netflix.github.io/dgs/getting-started/) for how to get started.