Use front matter for feed URL

src/_data/sitemeta.js

@@ -1,7 +1,6 @@
 module.exports = {
 	siteName: "Leilukin's Hub",
 	siteUrl: "https://leilukin.neocities.org" || "http://localhost:8080",
-	feedUrl: this.siteUrl + "/feed.xml",
 	siteLocale: "en_MY",
 	siteLanguage: "en",
 	siteDescription: "Leilukin's personal website.",

src/feed.njk

@@ -7,7 +7,7 @@ eleventyExcludeFromCollections: true
 <feed xmlns="http://www.w3.org/2005/Atom">
     <title>{{ sitemeta.siteName }}</title>
     <subtitle>{{ sitemeta.siteDescription }}</subtitle>
-    <link href="{{ sitemeta.feedUrl }}" rel="self"/>
+    <link href="{{ sitemeta.siteUrl + permalink }}" rel="self"/>
     <link href="{{ sitemeta.siteUrl }}"/>
     <updated>{{ collections.feedItems | getNewestCollectionItemDate | dateToRfc3339 }}</updated>
     <id>{{ sitemeta.siteUrl }}</id>