In `src/Skoruba.IdentityServer4.Admin` and `src/Skoruba.IdentityServer4.STS.Identity` in `Helpers/StartupHelpers.cs` replace all occurences of `UseSqlServer` with `UseNpgsql`. This will inform EntityFramework that PostgreSQL will be used instead of SQL Server.
# Final setup
## Generate initial migrations
[Follow these steps for generating of DB migrations](/README.md#ef-core--data-access)