refs #734 Adds nelmio api doc configuration

config/packages/nelmio_api_doc.yaml

@@ -0,0 +1,9 @@
+nelmio_api_doc:
+    documentation:
+        info:
+            title: My App
+            description: This is an awesome app!
+            version: 1.0.0
+    areas: # to filter documented areas
+        path_patterns:
+            - ^/oggit # Accepts routes under /api except /api/doc

config/routes/nelmio_api_doc.yaml

@@ -0,0 +1,12 @@
+# Expose your documentation as JSON swagger compliant
+app.swagger:
+    path: /api/doc.json
+    methods: GET
+    defaults: { _controller: nelmio_api_doc.controller.swagger }
+
+## Requires the Asset component and the Twig bundle
+## $ composer require twig asset
+#app.swagger_ui:
+#    path: /api/doc
+#    methods: GET
+#    defaults: { _controller: nelmio_api_doc.controller.swagger_ui }