Refactor: the project is now divided into a more clear structure, with **Infrastructure** and **Application** layers added.
Refactor: configurations are split into sections for different layers.
Fix: now EF Core related operations, such as migration, should be invoked in `OptixServe.Infrastructure`, with config file and data dir passed into `dotnet ef` command. See `OptixServe.Infrastructure/Utilites/DesignTimeDbContextFactory.cs` for details.
Fix: EF migrations are ignored in gitignore on purpose in early development.
Add: binding setting file items to `AppSettings` class so to provide DI access as `IOptions<OptixServeSettings>`.
Add: EF Core and DbContext to access database in services. This results in disabling NativeAOT due to poor supports for *pre-compiled query*, however many design are optimized for AOT for later re-adoption.
Add: `DesignTimeDbContextFactory` to support EF Core migrations in NativeAOT. (Kept for re-enabling AOT.)
Add: `DbInitializer` for ensuring database connecting in startup.
Add: `ConfigurationHelper.CreateDefaultBuilder()` to read configuration files in default locations. Note this method is currently ONLY used by `DesignTimeDbContextFactory`. Refactor is expected.
Add: `CommonErrorDto` for simple error message.
Add: `VersionEndpoint` ONLY for debugging and testing purpose. Verylikely to be removed in the future.
Other: many utilities and fixes easy to understand.
Note: EF Core migrations are excluded in the early development. Not expected to be added in version control before v1.0 beta.
