feat(nestjs): migrate to NestJS

packages/server/src/common/config/mail.ts

@@ -0,0 +1,13 @@
+import { registerAs } from '@nestjs/config';
+
+export default registerAs('mail', () => ({
+  host: process.env.MAIL_HOST,
+  username: process.env.MAIL_USERNAME,
+  password: process.env.MAIL_PASSWORD,
+  port: parseInt(process.env.MAIL_PORT, 10),
+  secure: process.env.MAIL_SECURE === 'true',
+  from: {
+    name: process.env.MAIL_FROM_NAME,
+    address: process.env.MAIL_FROM_ADDRESS,
+  },
+}));