Update Dockerfile

Dockerfile

@@ -28,10 +28,10 @@ RUN pip3 install --no-cache-dir -r backend/python/requirements.txt
 COPY . .
 
 # --- Create Runtime Directories & Set Permissions ---
-# Create directories that the application needs to write to at runtime.
-# Then, change their ownership to the non-root 'node' user so the app has write access.
-RUN mkdir -p /app/backend/uploads /app/backend/temp /app/backend/results /app/backend/database && \
-    chown -R node:node /app/backend/uploads /app/backend/temp /app/backend/results /app/backend/database
+ # Create ephemeral directories for temporary files. The database will be in-memory.
+ # Then, change ownership to the non-root 'node' user so the app has write access.
+ RUN mkdir -p /app/backend/uploads /app/backend/temp /app/backend/results && \
+     chown -R node:node /app/backend/uploads /app/backend/temp /app/backend/results
 
 # --- Build the React Frontend ---
 # This runs the memory-efficient build script from web/package.json