Mattermost bot for saving photos in synology

Закрыто effective-dev-opensource запросил слияние mattermost_synology_bot в develop

Created by: gull192

Mattermost bot for saving photos in synology. Full description of the task: https://www.notion.so/effectiveband/mattermost-best-photo-07f0865375c54a4db0d4ff37c32f7ea8