diff --git a/app/etc/blog.yaml b/app/etc/blog.yaml
index d98eb76..b618c71 100644
--- a/app/etc/blog.yaml
+++ b/app/etc/blog.yaml
@@ -3,17 +3,17 @@ Host: 0.0.0.0
 Port: 8888
 
 JWT:
-  Secret: "${JWT_SECRET}"
-  Issuer: "${JWT_ISSUER}"
-  ExpiresIn: ${JWT_EXPIRES_IN}
+  Secret: "${JWT_SECRET}" # JWT signing secret key
+  Issuer: "${JWT_ISSUER}" # JWT issuer, e.g., blog.cialloo.com
+  ExpiresIn: ${JWT_EXPIRES_IN} # Token expiration time in seconds, e.g., 86400 for 24 hours
 
 Database:
-  DSN: "${DATABASE_DSN}"
+  DSN: "${DATABASE_DSN}" # PostgreSQL connection string, e.g., postgres://user:password@localhost:5432/blog?sslmode=disable
 
 S3:
-  Region: "${S3_REGION}"
-  Bucket: "${S3_BUCKET}"
-  AccessKeyID: "${S3_ACCESS_KEY_ID}"
-  SecretAccessKey: "${S3_SECRET_ACCESS_KEY}"
-  Endpoint: "${S3_ENDPOINT}"
-  PresignedURLExpiration: ${S3_PRESIGNED_URL_EXPIRATION}
+  Region: "${S3_REGION}" # e.g., us-east-1 or auto for MinIO
+  Bucket: "${S3_BUCKET}" # e.g., my-blog-bucket
+  AccessKeyID: "${S3_ACCESS_KEY_ID}" # Your S3 access key
+  SecretAccessKey: "${S3_SECRET_ACCESS_KEY}" # Your S3 secret key
+  Endpoint: "${S3_ENDPOINT}" # e.g., https://s3.cialloo.com or https://s3.amazonaws.com (include https:// or http://)
+  PresignedURLExpiration: ${S3_PRESIGNED_URL_EXPIRATION} # Expiration time in seconds, e.g., 3600 for 1 hour