try universal image with no version

Author: hmdunce

.devcontainer/devcontainer.json

@@ -2,10 +2,13 @@
 // README at: https://github.com/devcontainers/templates/tree/main/src/universal
 {
   "name": "Default Linux Universal",
-  "image": "mcr.microsoft.com/devcontainers/universal:2-linux",
+  "image": "mcr.microsoft.com/devcontainers/universal",
   "customizations": {
     "vscode": {
       "extensions": ["esbenp.prettier-vscode", "unifiedjs.vscode-mdx"]
     }
-  }
+  },
+  "onCreateCommand": "bash .devcontainer/df.sh onCreate",
+  "updateContentCommand": "bash .devcontainer/df.sh updateContent",
+  "postCreateCommand": "bash .devcontainer/df.sh postCreate"
 }

.devcontainer/df.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+set -eux
+
+echo "$@" >> df.log
+df -h / >> df.log