Update Node.js example project

Author: kateinoigakukun

packages/npm-packages/ruby-wasm-wasi/example/README.md

@@ -2,12 +2,6 @@
 
 This is a simple example of how to use the `ruby-wasm-wasi` faimily packages
 
-## How to build
-
-```console
-$ npm install
-```
-
 ## For browser
 
 ```console
@@ -18,5 +12,6 @@ $ # Open http://localhost:8000/index.html
 ## For Node.js
 
 ```console
-$ node --experimental-wasi-unstable-preview1 dist/index.node.js
+$ npm install
+$ node --experimental-wasi-unstable-preview1 index.node.js
 ```

packages/npm-packages/ruby-wasm-wasi/example/index.node.js

@@ -1,11 +1,11 @@
 import fs from "fs/promises";
-import { DefaultRubyVM } from "ruby-head-wasm-wasi/dist/node.esm";
+import { DefaultRubyVM } from "ruby-head-wasm-wasi/dist/node.cjs.js";
 
 // $ node --experimental-wasi-unstable-preview1 index.node.js
 
 const main = async () => {
   const binary = await fs.readFile(
-    "./node_modules/ruby-head-wasm-wasi/bin/ruby.wasm"
+    "./node_modules/ruby-head-wasm-wasi/dist/ruby.wasm"
   );
   const module = await WebAssembly.compile(binary);
   const { vm } = await DefaultRubyVM(module);