add TypeORM postgres config and migration runner.

backend/src/AppModule.ts

@@ -1,13 +1,19 @@
 import { Module } from '@nestjs/common';
-import { ConfigModule } from '@nestjs/config';
-import appConfig from './config';
+import { ConfigModule, ConfigService, registerAs } from '@nestjs/config';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { getAppConfig, getPostgresConfig } from './config';
 import { HealthCheckModule } from './modules/healthCheck/HealthCheckModule';
+import { Config } from './types/Config';
 
 @Module({
     imports: [
         ConfigModule.forRoot({
             isGlobal: true,
-            load: [appConfig]
+            load: [registerAs('postgres', getPostgresConfig), registerAs('app', getAppConfig)]
+        }),
+        TypeOrmModule.forRootAsync({
+            useFactory: (configService: ConfigService) => configService.get('postgres') as Config['postgres'],
+            inject: [ConfigService]
         }),
         HealthCheckModule
     ]