.env.example 추가

Last3Mon/.env.example

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+# Course settings for every lab from day 64 (workflow-lab, kits, n8n credential script).
+# 1) Copy this file to .env in the same folder:   cp .env.example .env
+# 2) Put your OpenAI API key below.
+# .env is listed in .gitignore: never commit it, never paste the key into a workflow or a document.
+
+# --- OpenAI (course default) ---
+OPENAI_API_KEY=
+OPENAI_MODEL=gpt-4.1-mini
+OPENAI_EMBED_MODEL=text-embedding-3-large
+
+# --- workflow-lab (miniflow) ---
+# mock: no LLM call (tests, offline) / openai: course default / ollama: local models (no key yet)
+MINIFLOW_LLM=openai
+# When an OpenAI call fails, try the local Ollama models once more (day 64: WSL service, day 65+: container).
+MINIFLOW_LLM_FALLBACK=ollama
+OLLAMA_HOST=http://localhost:11434
+OLLAMA_MODEL=gemma3:4b
+EMBED_MODEL=bge-m3