chore: fix wording

Author: cyyeh

packages/doc/docs/catalog/installation.mdx

@@ -19,9 +19,14 @@ Before installing the VulcanSQL catalog-server from NPM, make sure the following
 
 ### NPM Install
 ```bash
-npm i -g @vulcan-sql/catalog-server
+npm i @vulcan-sql/catalog-server
 ```
 
+:::info
+
+At the moment, `@vulcan-sql/catalog-server` should be installed per project
+:::
+
 After installing `@vulcan-sql/catalog-server`, you can run:
 ```bash
 vulcan catalog