Added content type to S3 upload call

src/assets/assets.go

@@ -93,6 +93,7 @@ func Create(ctx context.Context, dbConn db.ConnOrTx, in CreateInput) (*models.As
 			Key:         &key,
 			Body:        bytes.NewReader(in.Content),
 			ACL:         types.ObjectCannedACLPublicRead,
+			ContentType: &in.ContentType,
 		})
 		return err
 	}