Add .env.example

.env.example

@@ -0,0 +1,19 @@
+# Environment variables for GraphRAG Inference Hackathon
+# Copy to .env and fill in your values
+
+# ──── OpenAI API ────────────────────────────────────
+OPENAI_API_KEY=your-openai-api-key-here
+LLM_MODEL=gpt-4o-mini
+EMBED_MODEL=text-embedding-3-small
+
+# ──── TigerGraph Cloud ──────────────────────────────
+# Sign up at https://tgcloud.io (free tier available)
+TG_HOST=https://YOUR_SUBDOMAIN.tgcloud.io
+TG_GRAPH=GraphRAG
+TG_USERNAME=tigergraph
+TG_PASSWORD=your-tigergraph-password
+TG_TOKEN=
+
+# ──── Dashboard ─────────────────────────────────────
+DASHBOARD_PORT=7860
+DEBUG=false