In Synology Container Manager, you use a Project to run a multi-container app.
From the knowledge base:
1. Open Project.
2. Click Create to start the creation wizard.
3. Set the general settings:
- Project Name
- Path: working directory for the project
- Source: upload a docker-compose.yml or create one with the editor
4. You can enable a web portal via Web Station.
5. Confirm the summary and click Done.
6. Choose whether to start the project after the wizard finishes.
Container Manager’s Project feature is for projects composed of one or multiple containers.
Sources used: [9], [10]