welcome: successful registration page (#82)

diff --git a/core/installer/welcome/create-account-success.html b/core/installer/welcome/create-account-success.html
new file mode 100644
index 0000000..7432da3
--- /dev/null
+++ b/core/installer/welcome/create-account-success.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html lang="en" data-theme="light">
+    <head>
+        <link rel="stylesheet" href="/static/pico.2.0.6.min.css">
+        <meta charset="UTF-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1" >
+        <title>Successful Registration</title>
+    </head>
+    <body>
+        <main class="container">
+            <div>
+                <p>Your account has been successfully created.</p>
+                <p>Click <a href="{{ .LoginAddr }}">here</a> to authenticate.</p>
+            </div>
+        </main>
+    </body>
+</html>