Added backup notice to storage-type migration

diff --git a/content/docs/admin/upload-config.md b/content/docs/admin/upload-config.md
index aa8920a73e208a284885da284b10b88f56742a84..ea1f1c19120a0fbf17185b67aef96157ccbc4473 100644 (file)
--- a/content/docs/admin/upload-config.md
+++ b/content/docs/admin/upload-config.md
@@ -158,6 +158,8 @@ STORAGE_ATTACHMENT_TYPE=local_secure
   ### Migrating to "Secure" Images      ### Migrating to "Secure" Images   
+***Back-up your BookStack instance before attempting any migration*** + 
 If you are migrating to the `STORAGE_TYPE=local_secure` or `STORAGE_TYPE=local_secure_restricted` options, with existing images, you will need to move all content from your previous image storage location (see above) to the  `storage/uploads/images` folder within your BookStack instance.     **Do not simply copy and leave content** in the `public/uploads/images` as those images will still be publicly accessible. After doing this migration you may have to clean-up and re-upload any 'App Icon' images, found in settings, since these need to remain publicly accessible.  If you are migrating to the `STORAGE_TYPE=local_secure` or `STORAGE_TYPE=local_secure_restricted` options, with existing images, you will need to move all content from your previous image storage location (see above) to the  `storage/uploads/images` folder within your BookStack instance.     **Do not simply copy and leave content** in the `public/uploads/images` as those images will still be publicly accessible. After doing this migration you may have to clean-up and re-upload any 'App Icon' images, found in settings, since these need to remain publicly accessible.