From 559ee6a4a9975ea94cac09dfc9e9efb8723a524b Mon Sep 17 00:00:00 2001
From: Ronald Tse <ronald.tse@ribose.com>
Date: Sun, 6 Sep 2026 23:00:07 +0200
Subject: [PATCH] fix: build flat page URLs to keep the pre-Astro URL space

Astro's default directory format emits about/index.html, which makes every
legacy URL 301 to a trailing slash and disagree with the canonical tags.
---
 astro.config.mjs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/astro.config.mjs b/astro.config.mjs
index 5a17ba7..9318316 100644
--- a/astro.config.mjs
+++ b/astro.config.mjs
@@ -18,6 +18,8 @@ function yamlData() {
 export default defineConfig({
   site: 'https://www.expresslang.org',
   output: 'static',
+  // Flat filenames (about.html) keep the pre-Astro URL space — no trailing-slash 301s
+  build: { format: 'file' },
   integrations: [vue()],
   vite: {
     plugins: [tailwindcss(), yamlData()],