Fix permission error for model cache directory

Dockerfile

@@ -12,8 +12,8 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/* \
     && apt-get clean
 
-# Create non-root user for security
-RUN groupadd -r appuser && useradd -r -g appuser appuser
+# Create non-root user for security with home directory
+RUN groupadd -r appuser && useradd -r -g appuser -m -d /home/appuser appuser
 
 # Copy requirements first for better caching
 COPY requirements.txt .
@@ -26,8 +26,8 @@ RUN pip install --no-cache-dir --upgrade pip && \
 COPY . .
 
 # Create necessary directories with proper permissions
-RUN mkdir -p cache uploads datasets && \
-    chown -R appuser:appuser /app
+RUN mkdir -p cache uploads datasets /home/appuser/.cache && \
+    chown -R appuser:appuser /app /home/appuser
 
 # Switch to non-root user
 USER appuser
@@ -35,6 +35,7 @@ USER appuser
 # Set environment variables
 ENV PYTHONUNBUFFERED=1
 ENV ENVIRONMENT=production
+ENV HF_HOME=/home/appuser/.cache
 
 # Expose port 7860 for HuggingFace Spaces
 EXPOSE 7860