sitemap: Remove trailing slashes from URLs

website/astro.config.mjs

@@ -1,4 +1,4 @@
-import { defineConfig } from 'astro/config';
+import { defineConfig } from "astro/config";
 import alpinejs from "@astrojs/alpinejs";
 import tailwind from "@astrojs/tailwind";
 import mdx from "@astrojs/mdx";
@@ -8,10 +8,23 @@ import sitemap from "@astrojs/sitemap";
 
 // https://astro.build/config
 export default defineConfig({
-  integrations: [alpinejs(), tailwind({
+  integrations: [
+    alpinejs(),
+    mdx(),
+    sitemap({
+      serialize(item) {
+        // To prevent crawling errors, remove the trailing slash from the URL
+        // otherwise it will be a link to a redirect URL and not the content.
+        item.url = item.url.replace(/\/$/, "");
+
+        return item;
+      },
+    }),
+    tailwind({
       config: {
-      applyBaseStyles: false
+        applyBaseStyles: false,
-    }
+      },
-  }), mdx(), sitemap()],
+    }),
-  site: 'https://www.oliverdavies.uk'
+  ],
+  site: "https://www.oliverdavies.uk",
 });