Merged PR 448: NestJSの環境変数をバリデータでチェックする

## 概要
[Task2729: NestJSの環境変数をバリデータでチェックする](https://paruru.nds-tyo.co.jp:8443/tfs/ReciproCollection/fa4924a4-d079-4fab-9fb5-a9a11eb205f0/_workitems/edit/2729)

- 環境変数のバリデータを実装しました。
  - 起動時にバリデータのチェックに失敗したらエラーとなるようにしています。

## レビューポイント
- チェック対象の環境変数は適切か
  - チェック内容は適切か

## UIの変更
- なし

## 動作確認状況
- ローカルで確認

## 補足
- 参考：[環境変数をバリデーションしたい](https://zenn.dev/waddy/articles/nestjs-configuration-service#5.-%E7%92%B0%E5%A2%83%E5%A4%89%E6%95%B0%E3%82%92%E3%83%90%E3%83%AA%E3%83%87%E3%83%BC%E3%82%B7%E3%83%A7%E3%83%B3%E3%81%97%E3%81%9F%E3%81%84)

dictation_server/.devcontainer/docker-compose.yml

@@ -2,7 +2,6 @@ version: '3'
 
 services:
   dictation_server:
-    env_file: ../.env
     build: .
     working_dir: /app/dictation_server
     ports:

dictation_server/src/app.module.ts

@@ -44,6 +44,7 @@ import { SortCriteriaRepositoryModule } from './repositories/sort_criteria/sort_
 import { TemplateFilesRepositoryModule } from './repositories/template_files/template_files.repository.module';
 import { WorktypesRepositoryModule } from './repositories/worktypes/worktypes.repository.module';
 import { TemplatesService } from './features/templates/templates.service';
+import { validate } from './common/validators/env.validator';
 
 @Module({
   imports: [
@@ -60,6 +61,7 @@ import { TemplatesService } from './features/templates/templates.service';
     ConfigModule.forRoot({
       envFilePath: ['.env.local', '.env'],
       isGlobal: true,
+      validate,
     }),
     AuthModule,
     AdB2cModule,

dictation_server/src/common/validators/env.validator.ts

@@ -0,0 +1,198 @@
+import { plainToClass } from 'class-transformer';
+import {
+  IsNotEmpty,
+  IsNumber,
+  IsOptional,
+  IsString,
+  validateSync,
+} from 'class-validator';
+
+/**
+ * 環境変数の型定義
+ */
+export class EnvValidator {
+  // .env
+  @IsNotEmpty()
+  @IsString()
+  DB_HOST: string;
+
+  @IsNotEmpty()
+  @IsNumber()
+  DB_PORT: number;
+
+  @IsNotEmpty()
+  @IsNumber()
+  DB_EXTERNAL_PORT: number;
+
+  @IsNotEmpty()
+  @IsString()
+  DB_NAME: string;
+
+  @IsNotEmpty()
+  @IsString()
+  DB_ROOT_PASS: string;
+
+  @IsNotEmpty()
+  @IsString()
+  DB_USERNAME: string;
+
+  @IsNotEmpty()
+  @IsString()
+  DB_PASSWORD: string;
+
+  @IsOptional()
+  @IsString()
+  NO_COLOR: string;
+
+  @IsNotEmpty()
+  @IsNumber()
+  ACCESS_TOKEN_LIFETIME_WEB: number;
+
+  @IsNotEmpty()
+  @IsNumber()
+  REFRESH_TOKEN_LIFETIME_WEB: number;
+
+  @IsNotEmpty()
+  @IsNumber()
+  REFRESH_TOKEN_LIFETIME_DEFAULT: number;
+
+  @IsNotEmpty()
+  @IsString()
+  TENANT_NAME: string;
+
+  @IsNotEmpty()
+  @IsString()
+  SIGNIN_FLOW_NAME: string;
+
+  @IsNotEmpty()
+  @IsNumber()
+  EMAIL_CONFIRM_LIFETIME: number;
+
+  @IsNotEmpty()
+  @IsString()
+  APP_DOMAIN: string;
+
+  @IsNotEmpty()
+  @IsNumber()
+  STORAGE_TOKEN_EXPIRE_TIME: number;
+
+  // .env.local
+  @IsOptional()
+  @IsString()
+  STAGE: string;
+
+  @IsOptional()
+  @IsString()
+  CORS: string;
+
+  @IsNotEmpty()
+  @IsNumber()
+  PORT: number;
+
+  @IsNotEmpty()
+  @IsString()
+  AZURE_TENANT_ID: string;
+
+  @IsNotEmpty()
+  @IsString()
+  AZURE_CLIENT_ID: string;
+
+  @IsNotEmpty()
+  @IsString()
+  AZURE_CLIENT_SECRET: string;
+
+  @IsNotEmpty()
+  @IsString()
+  ADB2C_TENANT_ID: string;
+
+  @IsNotEmpty()
+  @IsString()
+  ADB2C_CLIENT_ID: string;
+
+  @IsNotEmpty()
+  @IsString()
+  ADB2C_CLIENT_SECRET: string;
+
+  @IsNotEmpty()
+  @IsString()
+  ADB2C_ORIGIN: string;
+
+  @IsNotEmpty()
+  @IsString()
+  KEY_VAULT_NAME: string;
+
+  @IsNotEmpty()
+  @IsString()
+  JWT_PRIVATE_KEY: string;
+
+  @IsNotEmpty()
+  @IsString()
+  JWT_PUBLIC_KEY: string;
+
+  @IsNotEmpty()
+  @IsString()
+  SENDGRID_API_KEY: string;
+
+  @IsNotEmpty()
+  @IsString()
+  MAIL_FROM: string;
+
+  @IsNotEmpty()
+  @IsString()
+  NOTIFICATION_HUB_NAME: string;
+
+  @IsNotEmpty()
+  @IsString()
+  NOTIFICATION_HUB_CONNECT_STRING: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_NAME_US: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_NAME_AU: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_NAME_EU: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_KEY_US: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_KEY_AU: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_KEY_EU: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_ENDPOINT_US: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_ENDPOINT_AU: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_ENDPOINT_EU: string;
+}
+
+export function validate(config: Record<string, unknown>) {
+  const validatedConfig = plainToClass(EnvValidator, config, {
+    enableImplicitConversion: true,
+  });
+
+  const errors = validateSync(validatedConfig, {
+    skipMissingProperties: false,
+  });
+
+  if (errors.length > 0) {
+    throw new Error(errors.toString());
+  }
+  return validatedConfig;
+}