Updated the files.

my-app/node_modules/@angular/ssr/schematics/collection.json

@@ -0,0 +1,9 @@
+{
+  "schematics": {
+    "ng-add": {
+      "description": "Adds Angular SSR to the application without affecting any templates",
+      "factory": "./ng-add/index",
+      "schema": "./ng-add/schema.json"
+    }
+  }
+}

my-app/node_modules/@angular/ssr/schematics/ng-add/index.d.ts

@@ -0,0 +1,10 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import { Schema as SSROptions } from './schema';
+declare const _default: (options: SSROptions) => import("@angular-devkit/schematics").Rule;
+export default _default;

my-app/node_modules/@angular/ssr/schematics/ng-add/index.js

@@ -0,0 +1,11 @@
+"use strict";
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+const schematics_1 = require("@angular-devkit/schematics");
+exports.default = (options) => (0, schematics_1.externalSchematic)('@schematics/angular', 'ssr', options);

my-app/node_modules/@angular/ssr/schematics/ng-add/index.mjs

@@ -0,0 +1,9 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import { externalSchematic } from '@angular-devkit/schematics';
+export default (options) => externalSchematic('@schematics/angular', 'ssr', options);

my-app/node_modules/@angular/ssr/schematics/ng-add/schema.d.ts

@@ -0,0 +1,10 @@
+export interface Schema {
+    /**
+     * The name of the project.
+     */
+    project: string;
+    /**
+     * Skip installing dependency packages.
+     */
+    skipInstall?: boolean;
+}

my-app/node_modules/@angular/ssr/schematics/ng-add/schema.js

@@ -0,0 +1,4 @@
+"use strict";
+// THIS FILE IS AUTOMATICALLY GENERATED. TO UPDATE THIS FILE YOU NEED TO CHANGE THE
+// CORRESPONDING JSON SCHEMA FILE, THEN RUN devkit-admin build (or bazel build ...).
+Object.defineProperty(exports, "__esModule", { value: true });

my-app/node_modules/@angular/ssr/schematics/ng-add/schema.json

@@ -0,0 +1,22 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema",
+  "$id": "SchematicsAngularNgAddSSR",
+  "title": "Angular SSR Options Schema",
+  "type": "object",
+  "properties": {
+    "project": {
+      "type": "string",
+      "description": "The name of the project.",
+      "$default": {
+        "$source": "projectName"
+      }
+    },
+    "skipInstall": {
+      "description": "Skip installing dependency packages.",
+      "type": "boolean",
+      "default": false
+    }
+  },
+  "required": ["project"],
+  "additionalProperties": false
+}

my-app/node_modules/@angular/ssr/schematics/ng-add/schema.mjs

@@ -0,0 +1,3 @@
+// THIS FILE IS AUTOMATICALLY GENERATED. TO UPDATE THIS FILE YOU NEED TO CHANGE THE
+// CORRESPONDING JSON SCHEMA FILE, THEN RUN devkit-admin build (or bazel build ...).
+export {};

my-app/node_modules/@angular/ssr/schematics/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "commonjs"
+}