Track .env.example by excluding it from gitignore

Author: mpk-droid

agents/langflow/simple_tool_calling_agent/local/.env.example

@@ -0,0 +1,11 @@
+# PostgreSQL
+POSTGRES_USER=langflow
+POSTGRES_PASSWORD=langflow
+POSTGRES_DB=langflow
+
+# Ollama — model to pull on first run
+OLLAMA_MODEL=qwen2.5:7b
+
+# To use a remote model endpoint instead of Ollama, set:
+# OPENAI_API_BASE=https://your-cluster-model-endpoint/v1
+# OPENAI_API_KEY=your-key