Update Dockerfile

Dockerfile

@@ -1,12 +1,16 @@
-# --- Frontend Stage ---
+# --- Frontend Stage (React + Vite) ---
 FROM node:20-alpine AS frontend
 WORKDIR /ui
+
+# Copy package files and install deps
 COPY frontend/package*.json ./
-RUN npm ci --silent
+RUN npm ci --silent || npm install --silent
+
+# Copy frontend source and build
 COPY frontend ./
 RUN npm run build
 
-# --- Backend Stage ---
+# --- Backend Stage (FastAPI + Python) ---
 FROM python:3.11-slim
 WORKDIR /app
 
@@ -18,8 +22,11 @@ RUN pip install --no-cache-dir -r requirements.txt
 COPY backend ./backend
 COPY app.py Procfile .env.example ./
 
-# Copy built frontend
+# Copy built frontend from frontend stage
 COPY --from=frontend /ui/dist ./frontend_dist
 
+# Bust cache so Hugging Face doesn’t reuse stale Node layers
+ARG CACHE_BUST=1
+
 EXPOSE 7860
 CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]