HF Space: Docker entrypoint + React hybrid fixes

Dockerfile

@@ -0,0 +1,18 @@
+FROM python:3.9-slim
+
+ENV PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1
+
+WORKDIR /app
+
+COPY requirements.txt /app/requirements.txt
+RUN pip install --upgrade pip && pip install -r /app/requirements.txt
+
+COPY . /app
+
+RUN chmod +x /app/start_hf_space.sh
+
+ENV API_HOST=0.0.0.0 \
+    API_PORT=8000
+
+CMD ["/app/start_hf_space.sh"]

frontend/react_gradio_hybrid.py

@@ -1,6 +1,7 @@
 import sys
 import json
 import time
+import os
 from pathlib import Path
 from typing import Dict, List
 import logging
@@ -88,7 +89,8 @@ async def serve_frontend():
             
             const connectWebSocket = () => {
                 conversationIdRef.current = `react_conv_${Date.now()}`;
-                const wsUrl = `ws://127.0.0.1:7860/ws/frontend/${conversationIdRef.current}`;
+                const wsScheme = window.location.protocol === 'https:' ? 'wss' : 'ws';
+                const wsUrl = `${wsScheme}://${window.location.host}/ws/frontend/${conversationIdRef.current}`;
                 
                 const websocket = new WebSocket(wsUrl);
                 
@@ -538,15 +540,16 @@ async def forward_backend_messages(conversation_id: str):
 
 
 if __name__ == "__main__":
+    port = int(os.environ.get("PORT", "7860"))
     print("🚀 Starting AI Survey Simulator - React + WebSocket Manager")
     print(f"📡 Backend URL: {settings.frontend.backend_base_url}")
-    print(f"🌐 Frontend URL: http://127.0.0.1:7860")
+    print(f"🌐 Frontend URL: http://127.0.0.1:{port}")
     print(f"🔧 Using WebSocketManager for backend connection")
     print("=" * 60)
     
     uvicorn.run(
         app,
-        host="127.0.0.1",
-        port=7860,
+        host="0.0.0.0",
+        port=port,
         log_level=settings.log_level.lower()
-    )
+    )

start_hf_space.sh

@@ -0,0 +1,45 @@
+#!/bin/sh
+set -eu
+
+ROOT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+: "${API_HOST:=0.0.0.0}"
+: "${API_PORT:=8000}"
+: "${PORT:=7860}"
+: "${LOG_LEVEL:=info}"
+
+echo "Starting backend on ${API_HOST}:${API_PORT} ..."
+(
+  cd "${ROOT_DIR}/backend"
+  uvicorn api.main:app --host "${API_HOST}" --port "${API_PORT}" --log-level "${LOG_LEVEL}"
+) &
+BACKEND_PID=$!
+
+echo "Starting frontend (React hybrid) on 0.0.0.0:${PORT} ..."
+(
+  cd "${ROOT_DIR}"
+  PORT="${PORT}" python frontend/react_gradio_hybrid.py
+) &
+FRONTEND_PID=$!
+
+cleanup() {
+  echo "Shutting down..."
+  kill "${FRONTEND_PID}" 2>/dev/null || true
+  kill "${BACKEND_PID}" 2>/dev/null || true
+}
+
+trap cleanup EXIT SIGINT SIGTERM
+
+(
+  wait "${BACKEND_PID}" 2>/dev/null || true
+  echo "Backend exited"
+  kill "${FRONTEND_PID}" 2>/dev/null || true
+) &
+
+(
+  wait "${FRONTEND_PID}" 2>/dev/null || true
+  echo "Frontend exited"
+  kill "${BACKEND_PID}" 2>/dev/null || true
+) &
+
+wait "${FRONTEND_PID}" "${BACKEND_PID}"