maybe add as frontmatter and then it will work? looking at posts from 2015 as an example of this lol...

Author: jackharrhy

_posts/2024/08/2024-08-01-moving-to-discord.md

@@ -6,11 +6,12 @@ header:
   pattern: "header-texture.png"
 categories:
   - news
+image:
+  title: ctsnl-moving-to-discord.jpg
+	alt: Our logo, alongside the Discord logo, with a screenshot of the Discord client open to our server visible slightly in the background
 author: jackharrhy
 ---
 
-![Our logo, alongside the Discord logo, with a screenshot of the Discord client open to our server visible slightly in the background]({{site.urlimg}}ctsnl-moving-to-discord.jpg)
-
 We've decided to move our main messaging platform from Slack to Discord!
 
 Slack has done us well for quite a while, however in the time since the 2020 acquisition of Slack by Salesforce,