add k8s demo for api server

demos/samples_python/k8s_pods/README.md

@@ -0,0 +1,26 @@
+This demo shows how you can use a publicly hosted rest api and interact it using arch gateway.
+
+# How to run this demo.
+
+Before staring make sure you have completed the pre-requisites [here](https://github.com/katanemo/archgw?tab=readme-ov-file#prerequisites)
+
+In separate window start 1) model server, 2) arch gateway 3) docker container for UI and for debugging 4) tail access logs
+
+1. start model server
+   ```
+   archgw up --service model_server --foreground
+   ```
+
+1. start arch gateway
+   ```
+   archgw up --service archgw --foreground
+   ```
+
+1. start docker container for ui
+   ```
+   docker compose up
+   ```
+1. tail access logs
+   ```
+   tail -F ~/archgw_logs/access_*
+   ```