Update Dockerfile

Dockerfile

@@ -1,20 +1,18 @@
-FROM node:18-alpine
-
-WORKDIR /app/backend
-
-# Copy package files
-COPY backend/package*.json ./
-
-# Install dependencies
-RUN npm install --production
-
-# Copy backend source code
-COPY backend/ ./
-
-# Expose port (Hugging Face Spaces dùng port 7860)
-EXPOSE 7860
-
-# Start server
-
-CMD ["node", "server.js"]
-
+FROM node:18-alpine
+
+WORKDIR /app
+
+# Copy và install backend dependencies
+COPY backend/package*.json ./backend/
+WORKDIR /app/backend
+RUN npm install --production
+
+# Quay lại root để copy tất cả files
+WORKDIR /app
+COPY . .
+
+# Expose port
+EXPOSE 7860
+
+# Chạy server từ thư mục backend
+CMD ["node", "backend/server.js"]