feat: custom message if backups failed

src/server/process.rs

@@ -93,7 +93,11 @@ impl ServerProcess {
         // The server's save feature needs to be enabled again even if the archive failed to create
         self.custom("save-on")?;
 
+        if res.is_ok() {
             self.custom("say server backed up successfully")?;
+        } else {
+            self.custom("an error occured while backing up the server")?;
+        }
 
         res
     }