docs: configuration reference (#2428)

## Description

Adds documentation for the various config options 

## What type of PR is this? (check all applicable)
- [ ] Bug Fix
- [ ] Feature
- [ ] Refactor
- [ ] Deprecation
- [ ] Breaking Change
- [x] Documentation Update
- [ ] CI

## Checklist
- [ ] I have made corresponding changes to the documentation (`docs/`)
- [ ] I have made corresponding changes to the changelog
(`CHANGELOG.md`)

docs/configuration_reference.rst

@@ -0,0 +1,305 @@
+Configuration Reference
+=======================
+
+The bundle configuration is stored under the ``nelmio_api_doc`` key in your application configuration.
+
+.. code-block:: terminal
+
+    # displays the default config values
+    $ php bin/console config:dump-reference nelmio_api_doc
+
+    # displays the actual config values used by your application
+    $ php bin/console debug:config nelmio_api_doc
+
+.. code-block:: yaml
+
+    # Example default configuration
+    nelmio_api_doc:
+        # Whether to use the symfony/type-info component for determining types.
+        type_info: false
+        # If true, `groups` passed to #[Model] attributes will be used to limit validation constraints
+        use_validation_groups: false
+        cache:
+            # define cache pool to use
+            pool: null
+            # define cache item id
+            item_id: null
+        # The documentation to use as base
+        documentation:
+            # Example:
+            # info:
+            #   title: 'My App'
+            #   description: 'My App Description'
+         # List of enabled Media Types
+        media_types:
+            - json
+        # UI configuration options
+        html_config:
+            assets_mode: cdn
+            # https://swagger.io/docs/open-source-tools/swagger-ui/usage/configuration/
+            swagger_ui_config: []
+            # https://redocly.com/docs/redoc/config/
+            redocly_config: []
+        # Filter the routes that are documented
+        areas:
+            default:
+                path_patterns:
+                    # Examples:
+                    # - ^/api
+                    # - '^/api(?!/admin)'
+                host_patterns:
+                    # Example:
+                    # - ^api\.
+                name_patterns:
+                    # Example:
+                    # - ^api_v1
+            # whether to filter by attributes
+            with_annotation:       false
+            # if set disables default routes without attributes
+            disable_default_routes: false
+            # The base documentation used for the area
+            documentation:
+                # Example:
+                # info:
+                #   title: 'My App'
+                #   description: 'My App Description'
+            cache:
+                # define cache pool to use for the area
+                pool: null
+                # define cache item id for the area
+                item_id: null
+        models:
+            use_jms: false
+            names:
+                -
+                    alias: ~ # Example: 'Foo'
+                    type: ~ # Example: 'App\Foo'
+                    groups: null
+                    options: null
+                    serializationContext: []
+                    areas: []
+
+Configuration
+-------------
+
+type_info
+~~~~~~~~~
+
+**type**: ``boolean``
+**default**: ``false``
+
+Whether to use `symfony/type-info`_ for determining types.
+
+.. tip::
+
+    If you are using Symfony 7.2 or higher, you should set this option to ``true``. As this greatly improves type detection.
+
+use_validation_groups
+~~~~~~~~~~~~~~~~~~~~~
+
+**type**: ``boolean``
+**default**: ``false``
+
+If true, ``groups`` passed to ``#[Model]`` attributes will be used to limit validation constraints.
+
+cache
+~~~~~
+
+**type**: ``dictionary``
+**allowed keys**: ``pool``, ``item_id``
+
+Cache configuration for the generated documentation.
+
+.. code-block:: yaml
+
+        nelmio_api_doc:
+            # ...
+
+            cache:
+                # define cache pool to use
+                pool: 'cache.app'
+                # define cache item id
+                item_id: 'nelmio_api_doc_cache'
+
+documentation
+~~~~~~~~~~~~~
+
+**type**: ``dictionary``
+
+The api documentation to use as base.
+
+.. code-block:: yaml
+
+        nelmio_api_doc:
+            # ...
+
+            documentation:
+                # Any valid OpenAPI/Swagger documentation
+                info:
+                    title: 'My App'
+                    description: 'My App Description'
+
+media_types
+~~~~~~~~~~~
+
+**type**: ``list``
+**default**: ``['json']``
+**allowed values**: ``json``, ``xml``
+
+List of enabled Media Types.
+
+html_config
+~~~~~~~~~~~
+
+**type**: ``dictionary``
+**default**: ``[]``
+**allowed keys**: ``assets_mode``, ``swagger_ui_config``, ``redocly_config``
+
+UI configuration options.
+
+.. code-block:: yaml
+
+        nelmio_api_doc:
+            # ...
+
+            html_config:
+                assets_mode: 'cdn'
+                # https://swagger.io/docs/open-source-tools/swagger-ui/usage/configuration/
+                swagger_ui_config: []
+                # https://redocly.com/docs/redoc/config/
+                redocly_config: []
+
+areas
+~~~~~
+
+**type**: ``dictionary``
+
+Filter the routes that are documented.
+
+.. code-block:: yaml
+
+        nelmio_api_doc:
+            # ...
+
+            areas:
+                default:
+                    path_patterns:
+                        # Examples:
+                        # - ^/api
+                        # - '^/api(?!/admin)'
+                    host_patterns:
+                        # Example:
+                        # - ^api\.
+                    name_patterns:
+                        # Example:
+                        # - ^api_v1
+                with_annotation:       false
+                disable_default_routes: false
+                documentation:
+                    # Example:
+                    # info:
+                    #   title: 'My App'
+                    #   description: 'My App Description'
+                cache:
+                    # define cache pool to use for the area
+                    pool: null
+                    # define cache item id for the area
+                    item_id: null
+
+path_patterns
+.............
+
+**type**: ``list``
+**default**: ``[]``
+
+List of regular expressions to match against the path of the route.
+
+host_patterns
+.............
+
+**type**: ``list``
+**default**: ``[]``
+
+List of regular expressions to match against the host of the route.
+
+name_patterns
+.............
+
+**type**: ``list``
+**default**: ``[]``
+
+List of regular expressions to match against the name of the route.
+
+with_annotation
+...............
+
+**type**: ``boolean``
+**default**: ``false``
+
+Whether to only document routes with the ``#[Areas]`` annotation/attribute.
+
+disable_default_routes
+......................
+
+**type**: ``boolean``
+**default**: ``false``
+
+If set, disables default routes without annotations/attributes.
+
+documentation
+.............
+
+**type**: ``dictionary``
+**default**: ``[]``
+
+The base documentation used for the area.
+
+cache
+.....
+
+**type**: ``dictionary``
+**allowed keys**: ``pool``, ``item_id``
+
+Cache configuration for the generated area documentation.
+
+models
+~~~~~~
+
+**type**: ``dictionary``
+
+Configuration for models.
+
+use_jms
+.......
+
+**type**: ``boolean``
+**default**: ``false``
+
+Whether to use JMS Serializer for serialization.
+
+names
+.....
+
+**type**: ``list``
+
+List of models, this can be used to:
+- Define models that are not automatically detected.
+- Create a custom alias (schema name) for a model. (based groups/options/serializationContext/areas)
+
+.. code-block:: yaml
+
+        nelmio_api_doc:
+            # ...
+
+            models:
+                use_jms: false
+                names:
+                    -
+                        # Alias the class 'App\Foo' to 'FooPrivate' for the 'private' group
+                        alias: 'FooPrivate'
+                        type: 'App\Foo'
+                        groups:
+                            - 'private'
+
+
+.. _`symfony/type-info`: https://symfony.com/doc/current/components/type_info.html

docs/index.rst

@@ -617,6 +617,7 @@ If you need more complex features, take a look at:
     commands
     security
     symfony_attributes
+    configuration_reference
     faq
 
 .. _`SwaggerPHP examples`: https://github.com/zircote/swagger-php/tree/master/Examples