Update Node section in readme

Author: drwpow

README.md

@@ -48,7 +48,7 @@ npx @manifoldco/swagger-to-ts schema.yaml --camelcase --namespace OpenAPI --outp
 #### Generating multiple schemas
 
 Say you have multiple schemas you need to parse. I’ve found the simplest way
-to do that is just to use npm scripts. In your `package.json`, you can do
+to do that is to use npm scripts. In your `package.json`, you can do
 something like the following:
 
 ```json
@@ -61,8 +61,8 @@ something like the following:
 
 Rinse and repeat for more specs.
 
-For anything more complicated or for generating specs more dynamically, you
-can also use the Node API (below).
+For anything more complicated, or for generating specs dynamically, you can
+also use the Node API (below).
 
 ### Node
 
@@ -71,13 +71,18 @@ npm i --save-dev @manifoldco/swagger-to-ts
 ```
 
 ```js
+const { readFileSync } = require('fs');
 const swaggerToTS = require('@manifoldco/swagger-to-ts');
 
-swaggerToTS(spec, [options]);
+const spec = JSON.parse(readFileSync('spec.json', 'utf8')); // Can be any JS object, so long as it’s in OpenAPI format
+const options = { output: 'types.ts' }; // Optional
+swaggerToTS(spec, options);
 ```
 
-`spec` must be in JSON format. For an example of converting YAML to JSON, see
-the [generate.js](./scripts/generate.js) script.
+Although the CLI can handle YAML and JSON, the Node API only understands JS
+objects. A library such as [js-yaml][js-yaml] makes it trivial to convert
+YAML to JS. If you’re batching large folders of specs, [glob][glob] may also
+come in handy.
 
 ### Options
 
@@ -88,5 +93,7 @@ the [generate.js](./scripts/generate.js) script.
 | `camelcase` | `false`    | Convert `snake_case` properties to `camelCase`                                                       |
 | `swagger`   | `2`        | Which Swagger version to use. Currently only supports `2`.                                           |
 
+[glob]: https://www.npmjs.com/package/glob
+[js-yaml]: https://www.npmjs.com/package/js-yaml
 [namespace]: https://www.typescriptlang.org/docs/handbook/namespaces.html
 [prettier]: https://npmjs.com/prettier