Add my node

Signed-off-by: Michael Yuan <michael@secondstate.io>

docs/user-guide/apps/_category_.json

@@ -1,6 +1,6 @@
 {
   "label": "Agent frameworks and apps",
-  "position": 2,
+  "position": 3,
   "link": {
     "type": "generated-index",
     "description": "How to use a GaiaNet node as the backend service for an agent framework or app, replacing the OpenAI API."

docs/user-guide/mynode.md

@@ -0,0 +1,29 @@
+---
+sidebar_position: 2
+---
+
+# Use my GaiaNet node
+
+When you [start a GaiaNet node](../node-guide/quick-start), or you find a node on the web, you could use it as a
+web-based chatbot UI and an OpenAI compatible web service. Just load the node's public URL in the browser to open its dashboard.
+Let's say the URL is as follows.
+
+```
+https://0x1234...xyz.gaianet.network/
+```
+
+> Please refer to the [agent apps](apps/intro) section to see how to use the GaiaNet node API in your favorite agent frameworks or apps.
+
+## Web-based chatbot
+
+On the GaiaNet node dashboard, you will see a "Chat with this node" button. 
+
+![](chat_button.png)
+
+## OpenAI API replacement
+
+The GaiaNet node is a drop-in replacement for OpenAI API in [agent and LLM apps](apps/intro).
+On the GaiaNet node dashboard, you will see a table that shows how to replace OpenAI parameters in those apps.
+
+![](openai_api_options.png)
+

docs/user-guide/nodes.md

@@ -2,7 +2,7 @@
 sidebar_position: 1
 ---
 
-# Available GaiaNet nodes
+# Public GaiaNet nodes
 
 Each GaiaNet node provides a web-based chatbot UI and an OpenAI compatible web service.
 Here are some popular nodes. Please refer to the [agent apps](apps/intro) section to see how