Updated the files.

my-app/node_modules/@angular-devkit/build-angular/src/builders/prerender/schema.d.ts

@@ -0,0 +1,24 @@
+export interface Schema {
+    /**
+     * Target to build.
+     */
+    browserTarget: string;
+    /**
+     * Whether the builder should process the Angular Router configuration to find all
+     * unparameterized routes and prerender them.
+     */
+    discoverRoutes?: boolean;
+    /**
+     * The routes to render.
+     */
+    routes?: string[];
+    /**
+     * The path to a file that contains a list of all routes to prerender, separated by
+     * newlines. This option is useful if you want to prerender routes with parameterized URLs.
+     */
+    routesFile?: string;
+    /**
+     * Server target to use for prerendering the app.
+     */
+    serverTarget: string;
+}