fix: update vite config for ghp deployment

Author: jumpyjacko

vite.config.ts

@@ -5,4 +5,5 @@ import tailwindcss from '@tailwindcss/vite'
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [svelte(), tailwindcss()],
+  base: "/portfolio/",
 })