Add note to local development docs for NPM users

Some [users had trouble](https://www.reddit.com/r/Supabase/comments/zl8zgz/trying_to_install_supabase_cli/) when installing the Supabase CLI via NPM, this note may provide some guidance in these cases.

apps/docs/pages/guides/resources/supabase-cli/local-development.mdx

@@ -31,6 +31,13 @@ Make sure you have these installed on your local machine:
 supabase login
 ```
 
+<Admonition type="note">
+
+If you installed the Supabase CLI via NPM you may have to use `npx supabase login`.
+	
+</Admonition>
+
+
 ## Initialize your project
 
 Create a new folder for your project and start a new git repository: