chore: Implement logger with winston library

packages/backend/src/config/app.ts

@@ -0,0 +1,14 @@
+import * as dotenv from 'dotenv';
+dotenv.config();
+
+type AppConfig = {
+  port: string,
+  appEnv: string,
+}
+
+const appConfig: AppConfig = {
+  port: process.env.PORT || '3000',
+  appEnv: process.env.APP_ENV || 'development',
+}
+
+export default appConfig;