implement redis cache for context

src/AppConfig/appconfig.module.ts

@@ -1,11 +1,11 @@
 import { Global, Module } from '@nestjs/common';
 
 import { AppConfigSchema } from './appconfig.schema';
+import { AppConfigService } from './appconfig.service';
 
 @Global()
 @Module({
-  imports: [AppConfigSchema],
-  providers: [AppConfigSchema],
-  exports: [AppConfigSchema],
+  providers: [AppConfigSchema, AppConfigService],
+  exports: [AppConfigSchema, AppConfigService],
 })
 export class AppConfigModule {}