Update README.md

give more info on why we're doing this

Author: jessebot

README.md

@@ -1,8 +1,14 @@
 # Pixelfed helm chart
 <a href="https://github.com/small-hack/pixelfed-chart/releases"><img src="https://img.shields.io/github/v/release/small-hack/pixelfed-chart?style=plastic&labelColor=blue&color=green&logo=GitHub&logoColor=white"></a><br />
 
-A helm chart to setup [Pixelfed](https://pixelfed.org/). Uses matt's docker [image](ghcr.io/mattlqx/docker-pixelfed) for now.
+A helm chart to setup [Pixelfed](https://pixelfed.org/). Uses matt's docker [image](ghcr.io/mattlqx/docker-pixelfed) for now. This is still in a testing phase and may not be stable.
 
+## Features
+
+- includes subcharts for valkey (redis) and postgresql (database)
+- helm parameter docs autogenerated via helm-docs
+- use existing Secrets for valkey, postgresql, and smtp
+- RenovateBot keeps the subcharts and docker image up to date
 
 ## TLDR