add auth default configuration

src/config/auth.config.ts

@@ -0,0 +1,10 @@
+import { registerAs } from '@nestjs/config';
+import { Config } from './config';
+
+export interface AuthConfig extends Config {
+  encryptionAlgorithm: string;
+}
+
+export default registerAs('match', () => ({
+  encryptionAlgorithm: process.env.ENCRYPTION_ALGORITHM ?? 'BCRYPT',
+}));