feat: Attachment 모델 추가 및 관련 기능 구현

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

blog_prj/settings.py

@@ -111,6 +111,7 @@ INSTALLED_APPS = [
     'rest_framework_simplejwt',
     'drf_yasg',
     'corsheaders',
+    'storages',  # MinIO/S3 스토리지
     # create by.sdjo 2025-04-22
     'blog', # 2025-04-22 custom app create
 ]
@@ -253,3 +254,29 @@ STATIC_URL = 'static/'
 # https://docs.djangoproject.com/en/4.2/ref/settings/#default-auto-field
 
 DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
+
+# MinIO (S3 호환) 스토리지 설정
+MINIO_ENDPOINT = os.environ.get('MINIO_ENDPOINT', 'minio.icurfer.com:9000')
+MINIO_ACCESS_KEY = os.environ.get('MINIO_ACCESS_KEY', '')
+MINIO_SECRET_KEY = os.environ.get('MINIO_SECRET_KEY', '')
+MINIO_BUCKET = os.environ.get('MINIO_BUCKET', 'icurfer.com-posts')
+MINIO_USE_SSL = os.environ.get('MINIO_USE_SSL', '1') == '1'
+
+# django-storages S3 설정 (MinIO 호환)
+DEFAULT_FILE_STORAGE = 'storages.backends.s3boto3.S3Boto3Storage'
+
+AWS_ACCESS_KEY_ID = MINIO_ACCESS_KEY
+AWS_SECRET_ACCESS_KEY = MINIO_SECRET_KEY
+AWS_STORAGE_BUCKET_NAME = MINIO_BUCKET
+AWS_S3_ENDPOINT_URL = f"{'https' if MINIO_USE_SSL else 'http'}://{MINIO_ENDPOINT}"
+AWS_S3_USE_SSL = MINIO_USE_SSL
+AWS_S3_VERIFY = MINIO_USE_SSL
+AWS_DEFAULT_ACL = None
+AWS_S3_FILE_OVERWRITE = False
+AWS_QUERYSTRING_AUTH = True
+AWS_S3_SIGNATURE_VERSION = 's3v4'
+AWS_S3_REGION_NAME = os.environ.get('MINIO_REGION_NAME', 'ap-northeast-2')
+
+# 최대 업로드 파일 크기 (10MB)
+DATA_UPLOAD_MAX_MEMORY_SIZE = 10 * 1024 * 1024
+FILE_UPLOAD_MAX_MEMORY_SIZE = 10 * 1024 * 1024