About dependency injection

[yueyinqiu]

The database factory should be a scoped service since IJSProcess is scoped. The current way we register it will cause an error for blazor server. And in theory it should be disposable and should also close the connections when disposed.

And maybe the db store should be a singleton instead, since it does not change between scopes?

[yueyinqiu]

I would fix this after #30.