update db usage and init db files

BlueLaminate/BlueLaminate.EFCore/DependencyInjection/ServiceCollectionExtensions.cs

@@ -12,7 +12,8 @@ public static class ServiceCollectionExtensions
     {
         services.AddDbContext<SkinTrackerDbContext>(options =>
             options
-                .UseNpgsql(connectionString)
+                .UseNpgsql(connectionString, npgsql =>
+                    npgsql.MigrationsHistoryTable("__EFMigrationsHistory", SkinTrackerDbContext.Schema))
                 .UseSnakeCaseNamingConvention());
 
         return services;