change project template (#12493)

libs/cli/langchain_cli/project_template/README.md

@@ -5,34 +5,17 @@
 Install the LangChain CLI if you haven't yet
 
 ```bash
-pip install --user --upgrade git+https://github.com/pingpong-templates/cli.git
-```
-
-And install this package's dependencies
-
-```bash
-poetry install
+pip install -U "langchain-cli[serve]"
 ```
 
 ## Adding packages
 
 ```bash
-# if you have problems with `poe`, try `poetry run poe`
-
-# adding packages from https://github.com/pingpong-templates/hub
-langchain serve add extraction-openai-functions
-
-# adding custom GitHub repo packages
-langchain serve add git+https://github.com/hwchase17/chain-of-verification
-
-# with a custom api mount point (defaults to `/{package_name}`)
-poe add simple-translator --api_path=/my/custom/path/translator
+langchain serve add $PROJECT_NAME
 ```
 
-## Removing packages
+## Launch LangServe
 
-Note: you remove packages by their api path
-
-```bash
-langchain serve remove extraction-openai-functions
+```shell
+python app/server.py
 ```