Adding readme.md

Author: Delacrobix

supporting-blog-content/langgraph-js-elasticsearch/README.md

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+# LangGraph.js + Elasticsearch
+
+This application was developed to demonstrate the integration of LangGraph.js with Elasticsearch for advanced search workflows, as part of the Search Labs blog post [LangGraph JS + Elasticsearch
+](https://www.elastic.co/search-labs/blog/langgraph-js-elasticsearch).
+
+**Practical example:** A smart startup search system that combines LangGraph.js workflow orchestration with Elasticsearch's hybrid search capabilities to find venture capital opportunities using natural language queries.
+
+## Prerequisites
+
+- Node.js 18+
+- Elasticsearch 9.x running locally or remotely
+- OpenAI API key
+
+## Setup
+
+### Environment Variables
+
+- `OPENAI_API_KEY` - Your OpenAI API key
+- `ELASTICSEARCH_URL` - Elasticsearch endpoint 
+- `ELASTICSEARCH_API_KEY` - Elasticsearch API key
+
+1. Install dependencies:
+```bash
+npm install
+```
+
+2. Run the application:
+```bash
+npm start
+```
+
+
+## Example usage queries
+
+- **Market focused:**
+```
+Find fintech and healthcare startups in San Francisco, New York, or Boston
+```
+
+- **Invest focused:**
+```
+Find startups with Series A or Series B funding between $8M-$25M and monthly revenue above $500K 
+```