Clarify web/build/static dir for ChatGPT App Docs (lastmile-ai#598)

* Clarify web/build/static dir

* Update READMEs as well

Author: rholinshead

docs/cloud/use-cases/deploy-chatgpt-apps.mdx

@@ -11,15 +11,17 @@ OpenAI’s ChatGPT Apps platform can consume MCP servers as “Actions”. This
 
 - ChatGPT Apps developer access
 - Deployed MCP server with **unauthenticated access enabled** (`mcp-agent deploy ... --no-auth`)
-- Optional: frontend bundle (React, vanilla JS) if you want rich widgets
+- Optional: frontend bundle (React, vanilla JS) if you want rich widgets; the bundle should have build output (JS, CSS) at web/build/static or web/dist/static
 
 ## Recommended project structure
 
 ```
 chatgpt-app/
 ├── main.py                    # MCP server (FastMCP or MCPApp)
 ├── web/                       # Front-end assets (React build)
-├── static/                    # Optional static resources
+│   ├── build/                 # React build (or dist) output
+│   │   └── static/            # Built static resources (JS, CSS, etc.)
+│   └── src/                   # Optional, your React source files
 ├── mcp_agent.config.yaml
 └── requirements.txt
 ```

examples/cloud/chatgpt_app/README.md

@@ -64,6 +64,7 @@ References static files from a deployed server URL:
 - Better performance with caching
 - Requires initial deployment to get the server URL
 - Best for production use
+- NOTE: The deployed server will only serve static files from `web/build/static` or `web/dist/static`
 
 ## Prerequisites
 
@@ -82,7 +83,7 @@ yarn build
 cd ..
 ```
 
-This creates optimized production assets in `web/build/` that the server will serve.
+This creates optimized production assets in `web/build/static` that the server will serve.
 
 ## Test Locally
 

src/mcp_agent/data/examples/cloud/chatgpt_app/README.md

@@ -64,6 +64,7 @@ References static files from a deployed server URL:
 - Better performance with caching
 - Requires initial deployment to get the server URL
 - Best for production use
+- NOTE: The deployed server will only serve static files from `web/build/static` or `web/dist/static`
 
 ## Prerequisites
 
@@ -82,7 +83,7 @@ yarn build
 cd ..
 ```
 
-This creates optimized production assets in `web/build/` that the server will serve.
+This creates optimized production assets in `web/build/static` that the server will serve.
 
 ## Test Locally