Move guide to deployment section

docs/get-started/node-sizing.md → docs/deployment/node-sizing.md

@@ -1,6 +1,6 @@
 ---
 title: Cluster sizing
-sidebar_position: 4
+sidebar_position: 2
 ---
 
 In this guide, we discuss how to size your Quickwit cluster and nodes. As shown
@@ -95,8 +95,6 @@ least 2 cores and 8GB of RAM.
 
 ## Postgres Metastore backend
 
-For clustered deployments, we recommend using Postgres as a Metastore backend.
-
 For most use cases, a Postgres instance with 4GB of RAM and 1 core is
 sufficient:
 - with the AWS RDS managed service, use the t4g.medium instance type. Enable