nodejs: add Content-Type
nodejs: add Content-Type

ONLYOFFICE/document-server-integration,ONLYOFFICE/document-server-integration,ONLYOFFICE/document-server-integration,ONLYOFFICE/document-server-integration,ONLYOFFICE/document-server-integration,ONLYOFFICE/document-server-integration,ONLYOFFICE/document-server-integration,ONLYOFFICE/document-server-integration