Add upload directories creation in Dockerfile for better initialization

Dockerfile

@@ -97,10 +97,14 @@ RUN pip install --no-cache-dir --no-build-isolation git+https://github.com/deepi
 RUN python -c "import insightface; print('InsightFace installed successfully')" || \
     (echo "ERROR: InsightFace verification failed" && exit 1)
 
-# Copy only essential application files
+# Copy only essential application files (before switching user)
 COPY --chown=user:user api_server.py /app/
 COPY --chown=user:user DeepFakeAI/ /app/DeepFakeAI/
 
+# Create upload directories with proper permissions
+RUN mkdir -p /app/uploads/source_images /app/uploads/target_videos /app/uploads/result_videos && \
+    chown -R user:user /app/uploads
+
 # Switch to user
 USER user
 ENV PATH="/home/user/.local/bin:$PATH"