Document LangChain CLI (#29)

Document bootstrap using langchain cli

README.md

@@ -24,10 +24,24 @@ A javascript client is available in [LangChainJS](https://js.langchain.com/docs/
 - Client callbacks are not yet supported for events that originate on the server
 - Does not work with [pydantic v2 yet](https://github.com/tiangolo/fastapi/issues/10360)
 
+## LangChain CLI  🛠️
+
+Use the `LangChain` CLI to bootstrap a `LangServe` project quickly.
+
+To use the langchain CLI make sure that you have a recent version of `langchain` installed
+and also `typer`. (`pip install langchain typer` or `pip install "langchain[cli]"`)
+
+```sh
+langchain [directory-where-to-create-package]
+```
+
+And follow the instructions...
+
 ## Examples
 
 For more examples, see the [examples](./examples) directory.
 
+
 ### Server
 
 Here's a server that deploys an OpenAI chat model, an Anthropic chat model, and a chain that uses