feat: Implement file upload structure and API for file retrieval

docker-entrypoint-dev.sh

@@ -8,6 +8,14 @@ echo "🚀 Starting development environment..."
 # Ensure data directory exists
 mkdir -p /app/data
 
+# Ensure uploads directory structure exists
+mkdir -p /app/public/uploads/contracts
+mkdir -p /app/public/uploads/projects
+mkdir -p /app/public/uploads/tasks
+
+# Set proper permissions for uploads directory
+chmod -R 755 /app/public/uploads
+
 # Create admin account if it doesn't exist
 echo "🔧 Setting up admin account..."
 node scripts/create-admin.js