Remove GraalVM requirement from JS plugin docs

Author: ujibang

docs/foundations/core-concepts.adoc

@@ -191,7 +191,6 @@ RESTHeart automatically discovers plugins at startup:
 3. Executes via the polyglot plugin
 
 **Troubleshooting:** JavaScript plugins require:
-- GraalVM-based RESTHeart image (not standard image)
 - Valid `package.json` with plugin definition
 - `restheart-polyglot.jar` in `plugins/` directory
 

docs/foundations/setup-with-docker.adoc

@@ -313,14 +313,12 @@ RESTHeart Docker images come in four different versions:
 **For most users:** Use `latest` (the standard image)
 
 **Choose a different tag if:**
-- You need JavaScript plugins → Use `latest-graalvm`
-- You need smallest image size → Use `latest-distroless`
 - You're deploying to Kubernetes → Use `latest-native`
-- You need a specific version → Use version tags like `8.1.5`
+- You need a specific version → Use version tags like `9.1.1`
 
 ==== Docker Tag Reference
 - Standard multi-arch (FROM softinstigate/graalvm)
-- native (FROM debian:12.6-slim)
+- native (FROM debian:<version>-slim)
 
 These are example tags: