Update Dockerfile

Dockerfile

@@ -33,7 +33,11 @@ COPY requirements.txt .
 RUN pip install --no-cache-dir -U pip && \
     pip install --no-cache-dir -r requirements.txt
 
-# Copy application code
+# Download U^2-Net model file
+RUN wget -O u2net.pth https://github.com/xuebinqin/U-2-Net/raw/master/model/u2net.pth
+
+# Copy U^2-Net module and application code
+COPY u2net.py .
 COPY app.py .
 
 # Expose the port the app runs on (standard for Hugging Face Spaces)