Integrated the DocCMiddleware middleware into the AppBuilder builder in the app target.

Library/Sources/Public/AppBuilder.swift

@@ -31,6 +31,10 @@ public struct AppBuilder {
         }()
         
         let router = router(logger: logger)
+        
+        router.addMiddleware {
+            DocCMiddleware("Resources/Public")
+        }
 
         return Application(
             router: router,