Fix permission issue

Dockerfile

@@ -17,7 +17,12 @@ COPY . .
 # Create necessary directories with proper permissions
 RUN mkdir -p uploads md_files && \
     chmod 777 uploads && \
-    chmod 755 md_files
+    chmod 755 md_files && \
+    mkdir -p /tmp/matplotlib && \
+    chmod 777 /tmp/matplotlib
+
+# Set matplotlib config directory
+ENV MPLCONFIGDIR=/tmp/matplotlib
 
 # Default command
 CMD ["gunicorn", "--config", "gunicorn_config.py", "app:app"]

docker-compose.yml

@@ -9,8 +9,11 @@ services:
     volumes:
       - .:/app
       - upload_data:/app/uploads
+      - ./md_files:/app/md_files
+      - matplotlib_cache:/tmp/matplotlib
     environment:
       - FLASK_ENV=production
+      - MPLCONFIGDIR=/tmp/matplotlib
     deploy:
       resources:
         limits:
@@ -20,3 +23,4 @@ services:
 
 volumes:
   upload_data:
+  matplotlib_cache:

gunicorn_config.py

@@ -27,10 +27,10 @@ errorlog = "-"
 access_log_format = '%(h)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s "%(f)s" "%(a)s"'
 
 # Bind address - use HF_PORT for Hugging Face deployment
-bind = "0.0.0.0:8009"
+bind = "0.0.0.0:8009"  # Match HF port
 
 # Worker class
-worker_class = "sync"
+worker_class = "gthread"  # Use gthread instead of sync
 
 # Process name
 proc_name = "selector_server"