chore(admin): allow config avatar public path (#11689)

close #11677

packages/backend/server/src/core/config/config.ts

@@ -23,7 +23,7 @@ declare global {
 defineModuleConfig('server', {
   name: {
     desc: 'A recognizable name for the server. Will be shown when connected with AFFiNE Desktop.',
-    default: 'AFFiNE Cloud',
+    default: '',
   },
   externalUrl: {
     desc: `Base url of AFFiNE server, used for generating external urls.