chore: update README with phpdoc instructions

README.md

@@ -8,26 +8,26 @@ composer require yale-web-technologies/iiif-manifest-generator
 Requires PHP >=8.1.
 
 ### Usage ###
-Resources are mapped to class types.  Methods are available to add objects embedded within a resource. Passing true to the constructor of a resource will make it a top level resource within the JSON. 
+Resources are mapped to class types.  Methods are available to add objects embedded within a resource. Passing true to the constructor of a resource will make it a top level resource within the JSON.
 ```PHP
 <?php
 
-  require_once 'iif-manifest-generator/autoload.php'; 
+  require_once 'iif-manifest-generator/autoload.php';
   $manifest = new Manifest(true);
 
   $manifest->setID("http://example.org/iiif/book1/manifest");
   $manifest->addLabel("Book 1");
-  
+
   $thumbnail = new Thumbnail();
   $manifest->addThumbnail($thumbnail);
   $thumbnail->setID("http://example.org/images/book1-page1/full/80,100/0/default.jpg");
-  
+
   $service_thumbnail = new Service();
   $thumbnail->setService($service_thumbnail);
   $service_thumbnail->setContext("http://iiif.io/api/image/2/context.json");
   $service_thumbnail->setID("http://example.org/images/book1-page1");
   $service_thumbnail->setProfile("http://iiif.io/api/image/2/level1.json");
-  
+
   $sequence = new Sequence();
   $manifest->addSequence($sequence);
   $sequence->setID("http://example.org/iiif/book1/sequence/normal");
@@ -40,7 +40,16 @@ Resources are mapped to class types.  Methods are available to add objects embed
   $canvas->setWidth(500);
   $canvas->setHeight(500);
 ```
-See the docs folder for implementation specifications.
+
+### Generating Documentation
+Documentation is generated through [`phpdocumentor`](https://docs.phpdoc.org/). To create the documentation run the following:
+
+```sh
+composer install
+vendor/bin/phpdoc
+```
+
+To modify how the documentation is generated, a custom `phpdoc.xml` file can be provided. See the [`phpdocumentor` configuration docs](https://docs.phpdoc.org/guide/getting-started/configuration.html#configuration) for more details.
 
 ### TODO ###
   - Implement Image API