Fix directory permissions in Dockerfile

Dockerfile

@@ -23,6 +23,10 @@ RUN apt-get update && apt-get install -y \
     && apt-get install -y nodejs \
     && rm -rf /var/lib/apt/lists/*
 
+# Create necessary directories and set permissions
+RUN mkdir -p ./figures ./pdfs ./src/processed_markdown \
+    && chown -R 1000:1000 /app
+
 # Create a user with ID 1000 (required for Hugging Face Spaces)
 RUN useradd -m -u 1000 user
 USER user
@@ -30,9 +34,6 @@ ENV HOME=/home/user \
     PATH=/home/user/.local/bin:$PATH \
     PYTHONPATH=/app
 
-# Create necessary directories
-RUN mkdir -p ./figures ./pdfs ./src/processed_markdown
-
 # Copy and install Python requirements
 COPY --chown=user requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt