fix: elements examples (ory#1342)

Co-authored-by: tomekpapiernik <[email protected]>

Author: Benehiko

docs/kratos/bring-your-own-ui/15_custom-ui-ory-elements.mdx

@@ -52,29 +52,59 @@ Follow these steps to get the sample application code and run it on your machine
      git clone --depth 1 [email protected]:ory/elements.git
      cd elements
      npm run initialize
+     npm run build:clean
      cd examples/react-spa
      ```
 
+     Running the application outside the `ory/elements` repository:
+
+     ```shell
+     git clone --depth 1 [email protected]:ory/elements.git
+     cp -r elements/examples/react-spa .
+     cd react-spa
+     npm i @ory/elements-react @ory/client @ory/elements-test
+     ```
+
      </TabItem>
      <TabItem value="preact" label="Preact">
 
      ```shell
      git clone --depth 1 [email protected]:ory/elements.git
      cd elements
      npm run initialize
+     npm run build:clean
      cd examples/preact-spa
      ```
 
+     Running the application outside the `ory/elements` repository:
+
+     ```shell
+     git clone --depth 1 [email protected]:ory/elements.git
+     cp -r elements/examples/preact-spa .
+     cd preact-spa
+     npm i @ory/elements-preact @ory/client @ory/elements-test
+     ```
+
      </TabItem>
      <TabItem value="nextjs" label="Next.js">
 
      ```shell
      git clone --depth 1 [email protected]:ory/elements.git
      cd elements
      npm run initialize
+     npm run build:clean
      cd examples/nextjs-spa
      ```
 
+     Running the application outside the `ory/elements` repository:
+
+     ```shell
+     git clone --depth 1 [email protected]:ory/elements.git
+     cp -r elements/examples/nextjs-spa .
+     cd nextjs-spa
+     npm i @ory/elements @ory/client @ory/elements-test
+     ```
+
      </TabItem>
    </Tabs>
    ````
@@ -470,6 +500,14 @@ losing access to a second authentication factor.
 </Tabs>
 ```
 
+## End-to-end tests
+
+The examples provided by Ory Elements contain end-to-end tests through the `@ory/elements-test` library which provides convenience
+functions to test the login, registration, recovery, verification, and settings flows. In these examples, the tests are located in
+the `e2e` folder and are based on the [Playwright](https://playwright.dev/) library.
+
+To run the tests, execute the `npm run test` command inside the example directory.
+
 ## Learn more
 
 To learn more about Ory Elements, contribute to the project, and integrate with your application,