fix: add useExisting for custom provider

README.md

@@ -19,22 +19,67 @@ A Provider is a abstract concept. Maybe an Entity, a File, a structure, a compon
 ### Usage
 ```javascript
 
-import { boot, Application } from '@augejs/module-core';
+import { Module, Config, Value, boot, ILogger, GetLogger } from '@augejs/module-core';
+
+@Module()
+@Config({
+  fullName: "augejs awesome~",
+  hello: {
+    name: 'augejs',
+    age: 12,
+  }
+})
+class Module1 {
+  @Value('hello')
+  testName!:string;
+
+  @Value('fullName')
+  fullName!:string;
+
+  @Value('hello.age')
+  age!:number;
+
+  @GetLogger()
+  logger!:ILogger;
 
-@Application()
-export class AppModule {
-  onInit() {
-    console.log('AppModule onInit ');
+  async onInit() {
+    this.logger.info('Module1 onInit');
+    this.logger.info(`config: hello: ${JSON.stringify(this.testName)}`);
+    this.logger.info(`config fullName: ${this.fullName}`);
+    this.logger.info(`config age: ${this.age}`);
   }
-  onAppDidReady(context:any) {
-    console.log('AppModule onAppDidReady ');
+}
+
+@Module()
+class Module2 {
+  @GetLogger()
+  logger!:ILogger;
+
+  async onInit() {
+    this.logger.info('Module2 onInit');
+  }
+}
+
+@Module({
+  subModules: [
+    Module1, [Module2]
+  ]
+})
+class AppModule {
+
+  @GetLogger()
+  logger!:ILogger;
+
+  async onInit() {
+    this.logger.info('AppModule onInit');
   }
 }
 
 (async () => {
- await boot(AppModule);
+  await boot(AppModule);
 })();
 
+
 ```