Update Dockerfile

Dockerfile

@@ -1,7 +1,7 @@
 # Hugging Face Spaces - Docker (frontend + FastAPI backend)
 FROM node:20-bookworm-slim AS frontend-build
 WORKDIR /frontend
-COPY package.json package-lock.json bun.lockb* ./
+COPY package.json package-lock.json ./
 RUN npm ci
 COPY . .
 RUN npm run build
@@ -23,8 +23,9 @@ RUN pip install --no-cache-dir -r /app/requirements.txt
 COPY backend /app/backend
 COPY --from=frontend-build /frontend/dist /app/static
 
-# Copy scaler into image (model should also be placed at /app/model.keras before building)
+# Copy scaler + model into image
 COPY scaler.save /app/scaler.save
+COPY model.keras /app/model.keras
 
 ENV STATIC_DIR=/app/static
 EXPOSE 7860