docs: add view panel permission related instructions blog

website/blog/2023-09-19-view-panel-permission.md

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+---
+title: Group view panel permission problem
+authors: moonrailgun
+image: /img/logo.svg
+slug: view-panel-permission
+keywords:
+  - tailchat
+tags: []
+---
+
+Because of new version of group permission, all group user which create group before cannot view panel because of lost view panel permission.
+
+To batch update all group permission, you may need this script below.
+
+Go into mongodb bash, you can use script in bash like its operation: `docker exec -it <your-mongodb-container-name> mongo`
+
+
+
+### switch to tailchat db
+
+```
+use tailchat
+```
+
+### update all group and append `core.viewPanel` permission to all group
+
+```
+db.groups.updateMany({}, { $addToSet: { fallbackPermissions: "core.viewPanel" } })
+```