diff --git a/.env.example b/.env.example
index e870136..6c2a48f 100644
--- a/.env.example
+++ b/.env.example
@@ -58,7 +58,12 @@ AWS_S3_BUCKET=your-s3-bucket-name
 S3_FOLDER_PREFIX=development  # Root folder for all uploads (e.g., 'development', 'staging', 'production')
 # Custom endpoint for S3-compatible storage (DigitalOcean Spaces, MinIO,
 # Contabo). Leave blank for real AWS S3.
+# If it ends in /s3 (MinIO behind an nginx path prefix), the SDK signs against
+# the host root and browser-facing URLs keep the /s3 prefix.
 S3_ENDPOINT=
+# Public base for browser-facing URLs when it differs from the signing
+# endpoint. Defaults to S3_ENDPOINT.
+S3_PUBLIC_ENDPOINT=
 
 # Email (REQUIRED — boot fails without it)
 # The app POSTs JSON to this endpoint to send all transactional email.