add ssr doc

docs/en/framework/ui/angular/ssr-configuration.md

@@ -0,0 +1,115 @@
+```json
+//[doc-seo]
+{
+    "Description": "Learn how to configure Server-Side Rendering (SSR) for your Angular application in the ABP Framework to improve performance and SEO."
+}
+```
+
+# SSR Configuration
+
+[Server-Side Rendering (SSR)](https://angular.io/guide/ssr) is a process that involves rendering pages on the server, resulting in initial HTML content that contains the page state. This allows the browser to show the page to the user immediately, before the JavaScript bundles are downloaded and executed.
+
+SSR improves the **performance** (First Contentful Paint) and **SEO** (Search Engine Optimization) of your application.
+
+## 1. Install ABP Angular SSR
+
+The ABP Framework provides a schematic to easily add SSR support to your Angular application.
+
+Run the following command in the root folder of your Angular application:
+
+```shell
+yarn ng generate @abp/ng.schematics:ssr-add
+```
+
+Alternatively, you can specify the project name if you have a multi-project workspace:
+
+```shell
+yarn ng generate @abp/ng.schematics:ssr-add --project MyProjectName
+```
+
+This command automates the setup process by installing necessary dependencies, creating server-side entry points, and updating your configuration files.
+
+## 2. What Changes?
+
+When you run the schematic, it performs the following actions:
+
+### 2.1. Dependencies
+
+It adds the following packages to your `package.json`:
+
+-   **express**: A minimal and flexible Node.js web application framework.
+-   **@types/express**: Type definitions for Express.
+-   **openid-client**: A library for OpenID Connect (OIDC) relying party (RP) implementation, used for authentication on the server.
+
+**For Webpack projects only:**
+-   **browser-sync** (Dev dependency): Used for live reloading during development.
+
+### 2.2. Scripts & Configuration
+
+The changes depend on the builder used in your project (Application Builder or Webpack).
+
+#### Application Builder (esbuild)
+
+If your project uses the **Application Builder** (`@angular-devkit/build-angular:application`), the schematic:
+
+-   **Scripts**: Adds `serve:ssr:project-name` to serve the SSR application.
+-   **angular.json**: Updates the `build` target to enable SSR (`outputMode: 'server'`) and sets the SSR entry point.
+-   **tsconfig**: Updates the application's `tsconfig` to include `server.ts`.
+
+#### Webpack Builder
+
+If your project uses the **Webpack Builder** (`@angular-devkit/build-angular:browser`), the schematic:
+
+-   **Scripts**: Adds `dev:ssr`, `serve:ssr`, `build:ssr`, and `prerender` scripts.
+-   **angular.json**: Adds new targets: `server`, `serve-ssr`, and `prerender`.
+-   **tsconfig**: Updates the server's `tsconfig` to include `server.ts`.
+
+### 2.3. Files
+
+-   **server.ts**: This file is the main entry point for the server-side application.
+    -   **Standalone Projects**: Generates a server entry point compatible with `bootstrapApplication`.
+    -   **NgModule Projects**: Generates a server entry point compatible with `platformBrowserDynamic`.
+-   **app.routes.server.ts**: Defines server-side routes and render modes (e.g., Prerender, Server, Client). This allows fine-grained control over how each route is rendered.
+-   **index.html**: Removes the loading spinner (`<div id="lp-page-loader"></div>`) to prevent hydration mismatches.
+
+## 3. Running the Application
+
+After the installation is complete, you can run your application with SSR support.
+
+### Application Builder
+
+To serve the application with SSR in development:
+
+```shell
+yarn start
+# or
+yarn ng serve
+```
+
+To serve the built application (production):
+
+```shell
+yarn run serve:ssr:project-name
+```
+
+### Webpack Builder
+
+**Development:**
+
+```shell
+yarn run dev:ssr
+```
+
+**Production:**
+
+```shell
+yarn run build:ssr
+yarn run serve:ssr
+```
+
+## 4. Authentication & SSR
+
+The schematic installs `openid-client` to handle authentication on the server side. This ensures that when a user accesses a protected route, the server can validate their session or redirect them to the login page before rendering the content.
+
+> [!NOTE]
+> Ensure your OpenID Connect configuration (in `environment.ts` or `app.config.ts`) is compatible with the server environment.