Update propositional-retrieval template (#14766)

More descriptive name. Add parser in ingest. Update image link

templates/propositional-retrieval/propositional_retrieval.ipynb

@@ -0,0 +1,68 @@
+{
+ "cells": [
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "id": "681a5d1e",
+   "metadata": {},
+   "source": [
+    "## Run Template\n",
+    "\n",
+    "In `server.py`, set -\n",
+    "```\n",
+    "from fastapi import FastAPI\n",
+    "from langserve import add_routes\n",
+    "from propositional_retrieval import chain\n",
+    "\n",
+    "app = FastAPI(\n",
+    "    title=\"LangChain Server\",\n",
+    "    version=\"1.0\",\n",
+    "    description=\"Retriever and Generator for RAG Chroma Dense Retrieval\",\n",
+    ")\n",
+    "\n",
+    "add_routes(app, chain, path=\"/propositional-retrieval\")\n",
+    "\n",
+    "if __name__ == \"__main__\":\n",
+    "    import uvicorn\n",
+    "\n",
+    "    uvicorn.run(app, host=\"localhost\", port=8000)\n",
+    "\n",
+    "```"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d774be2a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langserve.client import RemoteRunnable\n",
+    "\n",
+    "rag_app = RemoteRunnable(\"http://localhost:8001/propositional-retrieval\")\n",
+    "rag_app.invoke(\"How are transformers related to convolutional neural networks?\")"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}