Use in-memory runtime state with SQLite write-through

RpgRoller/Program.cs

@@ -14,16 +14,18 @@ var sqliteConnectionString = builder.Configuration.GetConnectionString("RpgRolle
 EnsureSqliteDataDirectory(sqliteConnectionString, builder.Environment.ContentRootPath);
 
 builder.Services.AddSingleton<IPasswordHasher<UserAccount>, PasswordHasher<UserAccount>>();
-builder.Services.AddDbContext<RpgRollerDbContext>(options => options.UseSqlite(sqliteConnectionString));
+builder.Services.AddDbContextFactory<RpgRollerDbContext>(options => options.UseSqlite(sqliteConnectionString));
 builder.Services.AddSingleton<IDiceRoller, RandomDiceRoller>();
-builder.Services.AddScoped<IGameService, GameService>();
+builder.Services.AddSingleton<IGameService, GameService>();
 
 var app = builder.Build();
 
 using (var scope = app.Services.CreateScope())
 {
-    var db = scope.ServiceProvider.GetRequiredService<RpgRollerDbContext>();
+    var dbFactory = scope.ServiceProvider.GetRequiredService<IDbContextFactory<RpgRollerDbContext>>();
+    using var db = dbFactory.CreateDbContext();
     db.Database.EnsureCreated();
+    _ = scope.ServiceProvider.GetRequiredService<IGameService>();
 }
 
 app.UseDefaultFiles();