Looks like a case of @mifi is an idiot at times

docker-compose.prod.yml

@@ -20,7 +20,7 @@ services:
     container_name: walden-frontend
     build:
         context: .
-        target: base
+        target: runner
     restart: unless-stopped
     environment:
       - NODE_ENV=production

next.config.mjs

@@ -3,7 +3,7 @@
 const nextConfig = {
     experimental: {
         outputStandalone: true,
-      },
+    },
     typescript: {
         ignoreBuildErrors: true,
     }