fix: Allow viewers to upload avatar (#4349)

* fix: Allow viewers to upload avatar

* DeleteAttachmentTask

* fix: Previous avatar should be deleted on change, if possible

* fix: Also cleanup team logo on change

server/queues/tasks/DeleteAttachmentTask.ts

@@ -0,0 +1,17 @@
+import { Attachment } from "@server/models";
+import BaseTask from "./BaseTask";
+
+type Props = {
+  attachmentId: string;
+};
+
+export default class DeleteAttachmentTask extends BaseTask<Props> {
+  public async perform({ attachmentId }: Props) {
+    const attachment = await Attachment.findByPk(attachmentId);
+    if (!attachment) {
+      return;
+    }
+
+    await attachment.destroy();
+  }
+}