fix: Disable output buffering in Docker to show startup logs

backend/docker-compose.dev.yml

@@ -18,6 +18,8 @@ services:
       - MONGODB_URI=mongodb://mongodb:27017
       - MONGODB_DATABASE=normogen_dev
       - JWT_SECRET=dev-jwt-secret-key-minimum-32-chars
+      # Disable stdout/stderr buffering
+      - RUST_LOG_STYLE=always
     depends_on:
       mongodb:
         condition: service_healthy