Add request logging middleware for pod log visibility

- Add gunicorn access/error log options to Dockerfile
- Create RequestLoggingMiddleware for detailed request logging
- Log request method, path, host, IP, NHN headers, response status, duration

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

nhn_prj/settings.py

@@ -38,6 +38,7 @@ INSTALLED_APPS = [
 ]
 
 MIDDLEWARE = [
+    "nhn_prj.middleware.RequestLoggingMiddleware",  # 요청 로깅 (맨 위)
     "corsheaders.middleware.CorsMiddleware",
     "django.middleware.security.SecurityMiddleware",
     "django.contrib.sessions.middleware.SessionMiddleware",
@@ -240,5 +241,11 @@ LOGGING = {
             "level": "INFO",
             "propagate": False,
         },
+        # 요청 로깅 미들웨어
+        "nhn_prj.middleware": {
+            "handlers": ["console"],
+            "level": "INFO",
+            "propagate": False,
+        },
     },
 }