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

Library/Sources/Public/AppBuilder.swift

@@ -32,6 +32,10 @@ public struct AppBuilder {
         
         let router = router(logger: logger)
         
+        router.addMiddleware {
+            DocCMiddleware("Resources/Public")
+        }
+
         return Application(
             router: router,
             configuration: .init(