Manage container startup order and health checks via the UI

[ciux23]

Hello everyone,

I would like to propose the addition of new options in the CasaOS configurator to manage the startup order of containers and perform health checks directly through the user interface.

Context:
Currently, CasaOS only allows the configuration of environment variables, devices, container commands, cap-add, and volumes. It does not offer the ability to define container startup order or perform health checks to ensure that one container is fully operational before starting another.

Requested Features:

• Health Checks: Add the ability to configure a health check (e.g., curl --fail http://localhost:8123/ || exit 1) to ensure that a container is in a "healthy" state before starting the others.
• Dependencies (Depends_On): Introduce a functionality similar to Docker Compose's depends_on directive, which allows defining dependencies between containers, ensuring that a container only starts if the one it depends on has been started successfully.

Benefits:

• Improved coordination and stability during container restarts.
• Reduced errors caused by uncontrolled parallel container startups.
• Greater flexibility for complex environments where the startup order is critical.

I hope this proposal can be considered, as it would significantly improve container management in CasaOS.

Thank you for your attention and for your continuous work!

Best regards,
ciux