Refactor for flask

Vapor3.1.10/Sources/App/routes.swift

@@ -0,0 +1,20 @@
+import Vapor
+
+// Register your application's routes here.
+public func routes(_ router: Router) throws {
+    router.get("") { request in
+        return try request.view().render("home")
+    }
+    router.get("index.html") { request in
+        return try request.view().render("home")
+    }
+    router.get("privacy") { request in
+        return try request.view().render("privacy")
+    }
+    router.get("404") { request in
+        return try request.view().render("404")
+    }
+    router.get("welcome") { request in
+        return try request.view().render("welcome")
+    }
+}