diff --git a/files/index.html b/files/index.html
new file mode 100644
index 0000000..00acfe9
--- /dev/null
+++ b/files/index.html
@@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<html lang="en">
+	<!-- index.html file hosted at https://substitutes.freya.cat -->
+	<head>
+		<title>Sakura substitute server</title>
+		<meta charset="utf-8">
+		<meta name="author" content="freya">
+		<meta name="color-scheme" content="#181818">
+	</head>
+	<body>
+		<style>
+* {
+	box-sizing: border-box;
+}
+
+html, body {
+	margin: 0;
+	padding: 0;
+	background: #181818;
+	color: #fff;
+	font-family: DejaVu Sans, sans-serif;
+}
+
+body {
+	padding: 10px;
+	margin: auto;
+	max-width: 800px;
+}
+
+a, a:visited {
+	text-decoration: none;
+	color: #fcd1d7;
+}
+
+a:hover, a:focus {
+	text-decoration: underline;
+}
+
+pre {
+	background: #fff;
+	color:  #562135;
+	margin: 10px;
+	padding: 10px;
+	border-radius: 2px;
+}
+		</style>
+		<h1>🌸 Sakura Guix Channel</h1>
+		<h2>substitutes.freya.cat</h2>
+		<hr>
+		<p>Sakua is a guix channel that packages things that you may want but guix dosen't have.</p>
+		<p>View the git repository on <a href="https://g.freya.cat/freya/sakura">forgejo</a>.</p>
+		<h3>Channel</h3>
+		<p>To add sakura to your guix channels, use the following specification.</p>
+		<pre><code>(channel
+  (name 'sakura)
+  (url "https://g.freya.cat/freya/sakura")
+  (branch "main")
+  (introduction
+    (make-channel-introduction
+      "8fb2f9c2fa414754c41c1c73665e3e73e12693ab"
+      (openpgp-fingerprint
+        "3CD3 65F0 373C EB13 853A  F568 9FBC 6FFD 6D2D BF17"))))</code></pre>
+		<h3>Substitutes</h3>
+		<p>Sakura hosts a substitute server at <a href="#">substitutes.freya.cat</a> with the cuirass server running at <a href="https://cuirass.freya.cat">cuirass.freya.cat</a>. You can modify your guix-service-type with the following specification to enable the sakura substitute server.</p>
+		<pre><code>(service guix-service-type
+  (guix-configuration
+    (inherit config)
+    (substitute-urls
+      (append (list "https://substitutes.freya.cat")
+              %default-substitute-urls))
+    (authorized-keys
+      (append (list (local-file ".../sakura.pub"))
+              %default-authorized-guix-keys)))))))</pre></code>
+		<p>... where sakura.pub is a path to a file holding the following signing key.</p>
+		<pre><code>(public-key
+ (ecc
+  (curve Ed25519)
+  (q #3E9614FD06AF20F9534DA0DE64FB9004878789744F26FFF2FF381E2EED1DEAC9#)
+  )
+ )</pre></code>
+	</body>
+</html>
diff --git a/systems/cuirass.scm b/systems/cuirass.scm
index 39cf3a4..2804619 100644
--- a/systems/cuirass.scm
+++ b/systems/cuirass.scm
@@ -2,6 +2,7 @@
              (ice-9 match)
              (gnu packages ci)
              (gnu packages databases)
+             (gnu services)
              (gnu services cuirass)
              (gnu services avahi)
              (gnu services mcron)
@@ -71,6 +72,9 @@
                        (cache "/var/cache/publish")
                        (compression '(("zstd" 19)))
                        (port 8080)))
+                   ; guix publish index.html
+                   (extra-special-file "/srv/http/index.html"
+                                       (local-file "../files/index.html"))
                    ; postgresql
                    (service postgresql-service-type
                             (postgresql-configuration
