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
     ]

backend/src/config/index.ts

@@ -1,11 +1,28 @@
-import { registerAs } from '@nestjs/config';
 import { AppConfig } from '../types/AppConfig';
+import { PostgresConfig } from '../types/Config';
 import { NodeEnv } from '../types/NodeEnv';
 
 const env = (key: string): string => process.env[key] || '';
 
 const envInt = (key: string): number => parseInt(env(key), 10);
 
+const isEnabled = (key: string): boolean => env(key) === 'true';
+
+export const getPostgresConfig = (): PostgresConfig => {
+    return {
+        type: 'postgres',
+        url: `postgres://${env('POSTGRES_USER')}:${env('POSTGRES_PASSWORD')}@${env('POSTGRES_HOST')}:${env('POSTGRES_PORT')}/${env('POSTGRES_DB')}`,
+        host: env('POSTGRES_HOST'),
+        username: env('POSTGRES_USER'),
+        password: env('POSTGRES_PASSWORD'),
+        port: envInt('POSTGRES_PORT'),
+        database: env('POSTGRES_DB'),
+        entities: [__dirname + '/../modules/**/entities/*{.ts,.js}'],
+        migrations: [__dirname + '/../database/migrations/*{.ts,.js}'],
+        migrationsRun: isEnabled('POSTGRES_MIGRATIONS_RUN')
+    };
+};
+
 export const getAppConfig = (): AppConfig => {
     const rawOrigins = env('CORS_ORIGINS');
 
@@ -18,5 +35,3 @@ export const getAppConfig = (): AppConfig => {
             .filter(Boolean)
     };
 };
-
-export default registerAs('app', getAppConfig);

backend/src/database/DataSource.ts

@@ -0,0 +1,5 @@
+import { DataSource } from 'typeorm';
+
+import { getPostgresConfig } from '../config';
+
+export default new DataSource(getPostgresConfig());

backend/src/main.ts

@@ -2,13 +2,13 @@ import { ValidationPipe } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import { NestFactory } from '@nestjs/core';
 import { AppModule } from './AppModule';
-import { AppConfig } from './types/AppConfig';
+import { Config } from './types/Config';
 
 async function bootstrap() {
     const app = await NestFactory.create(AppModule);
 
     const configService = app.get(ConfigService);
-    const { port, corsOrigins } = configService.get('app') as AppConfig;
+    const { port, corsOrigins } = configService.get('app') as Config['app'];
 
     app.setGlobalPrefix('api');
 

backend/src/types/Config.ts

@@ -0,0 +1,19 @@
+import { AppConfig } from './AppConfig';
+
+export interface PostgresConfig {
+    type: 'postgres';
+    url: string;
+    host: string;
+    username: string;
+    password: string;
+    port: number;
+    database: string;
+    entities: string[];
+    migrations: string[];
+    migrationsRun: boolean;
+}
+
+export interface Config {
+    app: AppConfig;
+    postgres: PostgresConfig;
+}