fix: generate config as .mjs

Reworks the init script to generate the config as .mjs to avoid Node warnings.

Author: crisbeto

README.md

@@ -63,7 +63,7 @@ You can customize the `web-codegen-scorer eval` script with the following flags:
 
 - `--env=<path>` (alias: `--environment`): (**Required**) Specifies the path from which to load the
   environment config.
-    - Example: `web-codegen-scorer eval --env=foo/bar/my-env.js`
+    - Example: `web-codegen-scorer eval --env=foo/bar/my-env.mjs`
 
 - `--model=<name>`: Specifies the model to use when generating code. Defaults to the value of
   `DEFAULT_MODEL_NAME`.

docs/environment-reference.md

@@ -1,8 +1,8 @@
 # Environment configuration reference
 
-Environments are configured by creating a `config.js` that exposes an object that satisfies the
-`EnvironmentConfig` interface. This document covers all options in `EnvironmentConfig`
-and what they do.
+Environments are configured by creating a `config.mjs` or `config.js` file that exposes an object
+that satisfies the `EnvironmentConfig` interface. This document covers all options in
+`EnvironmentConfig` and what they do.
 
 ## Required properties
 

runner/init-cli.ts

@@ -80,9 +80,11 @@ async function getAnswers(): Promise<InitOptions | null> {
   const configPath = await input({
     message: 'Where should we place the environment config file?',
     required: true,
-    default: join(generateId(displayName) || 'env', 'config.js'),
+    default: join(generateId(displayName) || 'env', 'config.mjs'),
     validate: (value) =>
-      value.endsWith('.js') ? true : 'Config must be a .js file',
+      value.endsWith('.js') || value.endsWith('.mjs')
+        ? true
+        : 'Config must be a .mjs or .js file',
   });
   const clientSideFramework = await input({
     message: 'What client-side framework will it be using?',