chore: fix hello-world-spa example config

Author: ije

examples/hello-world-spa/aleph.config.ts

@@ -2,6 +2,7 @@ import css from '../../plugins/css.ts'
 import type { Config } from '../../types.ts'
 
 export default (): Config => ({
+  ssr: false,
   plugins: [
     css({
       postcss: { plugins: ['autoprefixer'] }