Update Tutorial

Tutorial.md

@@ -1,5 +1,21 @@
 In this page, we'll provide a guide to learn how to use NestLogged package.
 
+# Setup
+
+Since `v3.3.0`, you should put `ConsoleLogger` exported from nestlogged package to the `NestFactory.create` call.
+```ts
+import { ConsoleLogger } from 'nestlogged';
+
+const app = await NestFactory.create(AppModule, {
+  logger: new ConsoleLogger(),
+});
+```
+
+The definition of ConsoleLogger is 100% same with ConsoleLogger from `@nestjs/common`, so you can just use it normally.
+
+This new ConsoleLogger handles additional request scope parameter internally.
+
+
 # Method Logging
 
 ## Basic
@@ -86,4 +102,13 @@ export function LoggedRoute<F extends Array<any>, R>(
   options?: Partial<OverrideBuildOptions>
 ) {
   ...
-}
+}
+```
+
+## Logger Initialization
+
+For LoggedFunction and LoggedRoute decorator, it will initialize new `ScopedLogger` if it does not exists as `logger` property in the class. This initialization is processed on the first call of decorated function.
+
+`ScopedLogger` is the new class extending `Logger` from `@nestjs/common`, adding ability to add scope and scope id to each logs. But you don't have to worry about it, it's not a whole new system. It's completely same as usual logging, and internal code will do all the "scope" processes.
+
+If you want to know more about scoped logging, check Logger Injection & Scoped Logging.