fix: set base path for GitHub Pages subdirectory deployment

Author: Albert-Lsk

astro.config.mjs

@@ -5,6 +5,7 @@ import tailwindcss from '@tailwindcss/vite';
 // https://astro.build/config
 export default defineConfig({
   site: 'https://Albert-Lsk.github.io/Markdown-Tutorial',
+  base: '/Markdown-Tutorial',
   vite: {
     plugins: [tailwindcss()]
   },