Run playground in container

[Ehco1996]

Feature Request

Is your feature request related to a problem? Please describe:

as title

Describe the feature you'd like:

run tidb playground in one container

Why the featue is needed:

Many individual developers cannot afford the high price of the TiDB-cluster, but they may want to use related tools from the TiDB community.

For example, the TiDB dashboard / one-click Grafana monitor etc.

Consider that tiup already provides "tiup --tag xxx playground" to ensure that data is not lost.

Perhaps we could go a step further and provide docker images to help individual developers replace their mysql with tidb playground ?

By the way I think we can think of TiDB-playground as a lighter version of TiDB-cluster, e.g. the relationship between K3s and K8s

Describe alternatives you've considered:

I found this repo, which may help a little

Teachability, Documentation, Adoption, Migration Strategy:

[AstroProfundis]

No, tiup-playground is designed to be "played" and so it should be as easy as possible but stability is not a must, so involving dependency of container layer is not suitable for this goal.

But it's definitely a good idea to have something working with simple k8s environment to let users try TiDB on cloud easily, I'd prefer that to be a new, dedicated component (instead of inside of tiup-playground) to do so.