update footer to include last updated date

README.md

@@ -2,4 +2,4 @@
 
 https://mzhang.io
 
-License: GPL-3.0 / CC-BY-SA-4.0
+License: GPL-3.0 code / CC-BY-SA-4.0 contents

src/components/Footer.astro

@@ -1,16 +1,19 @@
 ---
 import "../styles/footer.scss";
+
+const dateUpdated = new Date();
 ---
 
 <footer>
   <p>
-    Blog code licensed under <a href="https://www.gnu.org/licenses/gpl-3.0.txt" target="_blank"
+    Blog theme and contents written by Michael Zhang with the <a
-      >GPL-3.0</a
+      href="https://astro.build/"
-    >. Post contents licensed under <a
+      target="_blank"
-      href="https://creativecommons.org/licenses/by-sa/4.0/legalcode.txt">CC BY-SA 4.0</a
+      rel="noreferrer noopener">Astro</a
-    >.
+    > framework.
     <br />
-     Written by Michael Zhang.
+    Last updated {dateUpdated.toLocaleString(undefined, { dateStyle: "full" })}.
-    <a href="https://git.mzhang.io/michael/blog" class="colorlink" target="_blank">Source</a>.
+    <br />
+    <a href="https://git.mzhang.io/michael/blog" class="colorlink" target="_blank">Source code</a>
   </p>
 </footer>