Adding admonition infrastructure

Author: forstisabella

src/connections/sources/catalog/libraries/website/javascript/upgrade-to-ajs2.md

@@ -48,6 +48,9 @@ If the source you intend to upgrade uses the in-domain instrumentation as well a
 
 Analytics.js 2.0 removes inbuilt quotes from cookie values, resulting in a different format for the `ajs_anonymous_id` value when compared to Analytics.js Classic.  Though you can retrieve cookie values with [standard supported functions](/docs/connections/sources/catalog/libraries/website/javascript/identity/#retrieve-the-anonymous-id), you'll need to configure your environment to accept the new format if your implementation relies on accessing the cookie value directly.
 
+> warning " Using the`utility` plugin"
+> Users who 
+
 ### Using a strict content security policy on the page
 
 Analytics.js 2.0 asynchronously loads different pieces of the library as needed. If the source you're upgrading uses a strict Content Security Policy (CSP) that allows JavaScript to be downloaded from specific locations, then you need to update the CSP to account for all the pieces used for Analytics.js 2.0. Therefore, beyond allowing the main analytics.min.js script, you should allow the following paths in your CSP: