Add back in

Author: liamjberrisford

short_courses/r_environments.ipynb

@@ -8,6 +8,8 @@
     "\n",
     "```{card}\n",
     "\n",
+    "<div class=\"alert alert-block\" style=\"background-color: #ffffff; border: 1px solid #ccc; padding: 1em; border-radius: 8px;\">\n",
+    "\n",
     "**Author:** Amy Heather (GitHub: [amyheather](https://github.com/amyheather), ORCID: [0000-0002-6596-3479](https://orcid.org/0000-0002-6596-3479)).\n",
     "\n",
     "**Reviewer:** Tom Monks (GitHub: [TomMonks](https://github.com/TomMonks), ORCID: [0000-0003-2631-4481](https://orcid.org/0000-0003-2631-4481)).\n",
@@ -16,6 +18,8 @@
     "\n",
     "**License:** Creative Commons Attribution-ShareAlike 4.0 International license ([CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)).\n",
     "\n",
+    "</div>\n",
+    "\n",
     "```\n",
     "\n",
     "## Course objectives\n",