Update README for Hybrid Search Weaviate (#12661)

- **Description:** Updated the README for Hybrid Search Weaviate

templates/hybrid-search-weaviate/README.md

@@ -1,16 +1,70 @@
-# Hybrid Search Weaviate
+# Hybrid Search in Weaviate
+This template shows you how to use the hybrid search feature in Weaviate. Hybrid search combines multiple search algorithms to improve the accuracy and relevance of search results. 
 
-This template performs hybrid search using Weaviate.
+Weaviate uses both sparse and dense vectors to represent the meaning and context of search queries and documents. The results use a combination of `bm25` and vector search ranking to return the top results. 
 
-##  Weaviate
-
-This connects to a hosted Weaviate vectorstore.
-
-Be sure that you have set a few env variables in `chain.py`:
+##  Configurations
+Connect to your hosted Weaviate Vectorstore by setting a few env variables in `chain.py`:
 
 * `WEAVIATE_ENVIRONMENT`
 * `WEAVIATE_API_KEY`
 
-##  LLM
+You will also need to set your `OPENAI_API_KEY` to use the OpenAI models.
 
-Be sure that `OPENAI_API_KEY` is set in order to use the OpenAI models.
+## Get Started 
+To use this package, you should first have the LangChain CLI installed:
+
+```shell
+pip install -U "langchain-cli[serve]"
+```
+
+To create a new LangChain project and install this as the only package, you can do:
+
+```shell
+langchain app new my-app --package hybrid-search-weaviate
+```
+
+If you want to add this to an existing project, you can just run:
+
+```shell
+langchain app add hybrid-search-weaviate
+```
+
+And add the following code to your `server.py` file:
+```python
+from hybrid_search_weaviate import chain as hybrid_search_weaviate_chain
+
+add_routes(app, hybrid_search_weaviate_chain, path="/hybrid-search-weaviate")
+```
+
+(Optional) Let's now configure LangSmith. 
+LangSmith will help us trace, monitor and debug LangChain applications. 
+LangSmith is currently in private beta, you can sign up [here](https://smith.langchain.com/). 
+If you don't have access, you can skip this section
+
+
+```shell
+export LANGCHAIN_TRACING_V2=true
+export LANGCHAIN_API_KEY=<your-api-key>
+export LANGCHAIN_PROJECT=<your-project>  # if not specified, defaults to "default"
+```
+
+If you are inside this directory, then you can spin up a LangServe instance directly by:
+
+```shell
+langchain serve
+```
+
+This will start the FastAPI app with a server is running locally at 
+[http://localhost:8000](http://localhost:8000)
+
+We can see all templates at [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs)
+We can access the playground at [http://127.0.0.1:8000/hybrid-search-weaviate/playground](http://127.0.0.1:8000/hybrid-search-weaviate/playground)  
+
+We can access the template from code with:
+
+```python
+from langserve.client import RemoteRunnable
+
+runnable = RemoteRunnable("http://localhost:8000/hybrid-search-weaviate")
+```