Add initial FastAPI application and requirements

app.py

@@ -0,0 +1,30 @@
+from fastapi import FastAPI, HTTPException
+from pydantic import BaseModel
+from datetime import datetime
+import json
+
+app = FastAPI()
+
+JSONL_FILE = "feedback_dataset.jsonl"
+
+class Feedback(BaseModel):
+    question: str
+    answer: str
+    rating: int
+
+@app.post("/rate")
+def rate_feedback(feedback: Feedback):
+    if feedback.rating < 1 or feedback.rating > 5:
+        raise HTTPException(status_code=400, detail="Rating must be between 1 and 5")
+
+    record = {
+        "timestamp": datetime.now().isoformat(),
+        "question": feedback.question.strip(),
+        "answer": feedback.answer.strip(),
+        "rating": int(feedback.rating)
+    }
+
+    with open(JSONL_FILE, "a", encoding="utf-8") as f:
+        f.write(json.dumps(record, ensure_ascii=False) + "\n")
+
+    return {"message": "✅ Feedback saved"}

requirements.txt

@@ -0,0 +1,2 @@
+fastapi
+uvicorn