Deployed the page to Github Pages.

node_modules/@angular/fire/schematics/add/index.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.ngAdd = void 0;
+const common_1 = require("../common");
+const versions_json_1 = require("../versions.json");
+const tasks_1 = require("@angular-devkit/schematics/tasks");
+const ngAdd = (options) => (tree, context) => {
+    common_1.addDependencies(tree, versions_json_1.peerDependencies, context);
+    const npmInstallTaskId = context.addTask(new tasks_1.NodePackageInstallTask());
+    context.addTask(new tasks_1.RunSchematicTask('ng-add-setup-project', options), [npmInstallTaskId]);
+    return tree;
+};
+exports.ngAdd = ngAdd;

node_modules/@angular/fire/schematics/add/schema.json

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+{
+    "$schema": "http://json-schema.org/draft-07/schema",
+    "$id": "angular-fire-ng-add",
+    "title": "AngularFire ng-add",
+    "type": "object",
+    "properties": {
+      "project": {
+        "type": "string",
+        "description": "The name of the project.",
+        "$default": {
+          "$source": "projectName"
+        }
+      }
+    },
+    "required": []
+  }