Fix GitHub Pages asset paths by using relative base URL

- Set base: './' in Vite config for relative asset paths
- Fixes 404 errors for JS/CSS assets on GitHub Pages

Author: robertpitt

vite.config.ts

@@ -3,6 +3,7 @@ import legacy from '@vitejs/plugin-legacy'
 
 export default defineConfig({
   root: 'playground',
+  base: './', // Use relative paths for GitHub Pages
   plugins: [
     legacy({
       targets: ['defaults', 'not IE 11']