what public sql database to use when publishing asp.net web application appsettings.json code example

Example: how asp.net core works with sql server

public void ConfigureServices(IServiceCollection services)
{
    services.AddRazorPages();

    services.AddDbContext<RazorPagesMovieContext>(options =>
      options.UseSqlServer(Configuration.GetConnectionString("RazorPagesMovieContext")));
}