docs(.env.ionos.sample): add RAG / code execution configs

Refs: PRODAI-418

Author: thlehmann-ionos

docs/IONOS/.env.ionos.sample

@@ -1,3 +1,14 @@
+# RAG (retrieval augmented generation)
+#
+RAG_EMBEDDING_ENGINE=openai
+RAG_OPENAI_API_BASE_URL=https://openai.inference.de-txl.ionos.com/v1
+RAG_EMBEDDING_MODEL=BAAI/bge-m3
+# Set to the same value as OPENAI_API_KEY
+RAG_OPENAI_API_KEY=...
+
+# Running Python code client side via Pyodide (via Webassembly)
+ENABLE_CODE_EXECUTION=false
+
 # Whether to login automatically during development
 # WEBUI_AUTH: False = auto-login, True = allow subscribe + login (WEBUI_SECRET_KEY required)
 WEBUI_AUTH=True