Enhance TypeScript configuration and logging setup

- Added "rootDir" to tsconfig.build.json for improved build structure.
- Implemented dynamic import for fs/promises in nest-logger.config.ts to ensure compatibility in different environments and handle directory creation more robustly.

apps/bff/tsconfig.build.json

@@ -5,6 +5,7 @@
     "incremental": true,
     "tsBuildInfoFile": "./tsconfig.build.tsbuildinfo",
     "outDir": "./dist",
+    "rootDir": "./src",
     "sourceMap": true,
     "declaration": false,
     "removeComments": true,

packages/shared/src/logging/nest-logger.config.ts

@@ -1,7 +1,19 @@
 // Lightweight, framework-agnostic factory that returns an object compatible
 // with nestjs-pino's LoggerModule.forRoot({ pinoHttp: {...} }) shape without importing types.
 import { join } from "path";
-import { mkdir } from "fs/promises";
+
+// Dynamic import for fs/promises - will be resolved at runtime
+async function getMkdir() {
+  if (typeof window !== 'undefined' || typeof process === 'undefined') {
+    return null;
+  }
+  try {
+    const fs = await import("fs/promises");
+    return fs.mkdir;
+  } catch {
+    return null;
+  }
+}
 
 export async function createNestPinoConfig(configService: {
   get<T = string>(key: string, defaultValue?: T): T;
@@ -11,10 +23,13 @@ export async function createNestPinoConfig(configService: {
   const appName = configService.get<string>("APP_NAME", "customer-portal-bff");
 
   if (nodeEnv === "production") {
-    try {
-      await mkdir("logs", { recursive: true });
-    } catch {
-      // ignore
+    const mkdir = await getMkdir();
+    if (mkdir) {
+      try {
+        await mkdir("logs", { recursive: true });
+      } catch {
+        // ignore
+      }
     }
   }