[DOCS] Adds a signpost for downloading ES or signing-up for ESS. (ela…

…stic#1379)

README.md

@@ -1,13 +1,17 @@
 <img align="right" width="auto" height="auto" src="https://www.elastic.co/static-res/images/elastic-logo-200.png"/>
 
-Elasticsearch PHP client
-========================
+# Elasticsearch PHP client
 
 [![Build status](https://github.com/elastic/elasticsearch-php/workflows/PHP%20test/badge.svg)](https://github.com/elastic/elasticsearch-php/actions) [![Latest Stable Version](https://poser.pugx.org/elasticsearch/elasticsearch/v/stable)](https://packagist.org/packages/elasticsearch/elasticsearch) [![Total Downloads](https://poser.pugx.org/elasticsearch/elasticsearch/downloads)](https://packagist.org/packages/elasticsearch/elasticsearch)
 
-This is the official PHP client for 
+This is the official PHP client for
 [Elasticsearch](https://www.elastic.co/elasticsearch/).
 
+**[Download the latest version of Elasticsearch](https://www.elastic.co/downloads/elasticsearch)**
+or
+**[sign-up](https://cloud.elastic.co/registration?elektra=en-ess-sign-up-page)**
+**for a free trial of Elastic Cloud**.
+
 ## Contents
 
 - [Installation](#installation)
@@ -27,73 +31,73 @@ This is the official PHP client for
 Refer to the [Installation section](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_installation)
 of the getting started documentation.
 
-## Connecting
+## Connecting
 
 Refer to the [Connecting section](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_connecting)
 of the getting started documentation.
 
 ## Usage
 
-The `elasticsearch-php` client offers 400+ endpoints for interacting with 
-Elasticsearch. A list of all these endpoints is available in the 
+The `elasticsearch-php` client offers 400+ endpoints for interacting with
+Elasticsearch. A list of all these endpoints is available in the
 [official documentation](https://www.elastic.co/guide/en/elasticsearch/reference/current/rest-apis.html)
 of Elasticsearch APIs.
 
-Here we reported the basic operation that you can perform with the client: 
+Here we reported the basic operation that you can perform with the client:
 index, search and delete.
 
-* [Creating an index](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_creating_an_index)
-* [Indexing a document](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_indexing_documents)
-* [Getting documents](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_getting_documents)
-* [Searching documents](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_searching_documents)
-* [Updating documents](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_updating_documents)
-* [Deleting documents](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_deleting_documents)
-* [Deleting an index](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_deleting_an_index)
+- [Creating an index](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_creating_an_index)
+- [Indexing a document](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_indexing_documents)
+- [Getting documents](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_getting_documents)
+- [Searching documents](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_searching_documents)
+- [Updating documents](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_updating_documents)
+- [Deleting documents](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_deleting_documents)
+- [Deleting an index](https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/getting-started-php.html#_deleting_an_index)
 
 ### Versioning
 
 This client is versioned and released alongside Elasticsearch server.
 
-To guarantee compatibility, use the most recent version of this library within 
+To guarantee compatibility, use the most recent version of this library within
 the major version of the corresponding Enterprise Search implementation.
 
-For example, for Elasticsearch `7.16`, use `7.16` of this library or above, but 
+For example, for Elasticsearch `7.16`, use `7.16` of this library or above, but
 not `8.0`.
 
 ## Backward Incompatible Changes :boom:
 
-The 8.0.0 version of `elasticsearch-php` contains a new implementation compared 
-with 7.x. It supports [PSR-7](https://www.php-fig.org/psr/psr-7/) for HTTP 
-messages and [PSR-18](https://www.php-fig.org/psr/psr-18/) for HTTP client 
-communications. 
+The 8.0.0 version of `elasticsearch-php` contains a new implementation compared
+with 7.x. It supports [PSR-7](https://www.php-fig.org/psr/psr-7/) for HTTP
+messages and [PSR-18](https://www.php-fig.org/psr/psr-18/) for HTTP client
+communications.
 
-We tried to reduce the BC breaks as much as possible with `7.x` but there are 
+We tried to reduce the BC breaks as much as possible with `7.x` but there are
 some (big) differences:
 
 - we changed the namespace, now everything is under `Elastic\Elasticsearch`
-- we used the 
-  [elastic-transport-php](https://github.com/elastic/elastic-transport-php) 
+- we used the
+  [elastic-transport-php](https://github.com/elastic/elastic-transport-php)
   library for HTTP communications;
-- we changed the `Exception` model, using the namespace 
-  `Elastic\Elasticsearch\Exception`. All the exceptions extends the 
+- we changed the `Exception` model, using the namespace
+  `Elastic\Elasticsearch\Exception`. All the exceptions extends the
   `ElasticsearchException` interface, as in 7.x
-- we changed the response type of each endpoints using an 
-  [Elasticsearch](src/Response/Elasticsearch.php) response class. This class 
-  wraps a a [PSR-7](https://www.php-fig.org/psr/psr-7/) response allowing the 
-  access of the body response as array or object. This means you can access the 
+- we changed the response type of each endpoints using an
+  [Elasticsearch](src/Response/Elasticsearch.php) response class. This class
+  wraps a a [PSR-7](https://www.php-fig.org/psr/psr-7/) response allowing the
+  access of the body response as array or object. This means you can access the
   API response as in 7.x, no BC break here! :angel:
-- we changed the `ConnectionPool` in `NodePool`. The `connection` naming was 
+- we changed the `ConnectionPool` in `NodePool`. The `connection` naming was
   ambigous since the objects are nodes (hosts)
 
-You can have a look at the [BREAKING_CHANGES](BREAKING_CHANGES.md) file for more 
+You can have a look at the [BREAKING_CHANGES](BREAKING_CHANGES.md) file for more
 information.
 
 ## Mock the Elasticsearch client
 
 If you need to mock the Elasticsearch client you just need to mock a
 [PSR-18](https://www.php-fig.org/psr/psr-18/) HTTP Client.
 
-For instance, you can use the 
+For instance, you can use the
 [php-http/mock-client](https://github.com/php-http/mock-client) as follows:
 
 ```php
@@ -122,52 +126,52 @@ echo $result->asString(); // This is the body!
 ```
 
 We are using the `ClientBuilder::setHttpClient()` to set the mock client.
-You can specify the response that you want to have using the 
-`addResponse($response)` function. As you can see the `$response` is a PSR-7 
-response object. In this example we used the `Nyholm\Psr7\Response` object from 
-the [nyholm/psr7](https://github.com/Nyholm/psr7) project. If you are using 
-[PHPUnit](https://phpunit.de/) you can even mock the `ResponseInterface` as 
+You can specify the response that you want to have using the
+`addResponse($response)` function. As you can see the `$response` is a PSR-7
+response object. In this example we used the `Nyholm\Psr7\Response` object from
+the [nyholm/psr7](https://github.com/Nyholm/psr7) project. If you are using
+[PHPUnit](https://phpunit.de/) you can even mock the `ResponseInterface` as
 follows:
 
 ```php
 $response = $this->createMock('Psr\Http\Message\ResponseInterface');
 ```
 
-**Notice**: we added a special header in the HTTP response. This is the product 
-check header, and it is required for guarantee that `elasticsearch-php` is 
+**Notice**: we added a special header in the HTTP response. This is the product
+check header, and it is required for guarantee that `elasticsearch-php` is
 communicating with an Elasticsearch server 8.0+.
 
-For more information you can read the 
-[Mock client](https://docs.php-http.org/en/latest/clients/mock-client.html) 
+For more information you can read the
+[Mock client](https://docs.php-http.org/en/latest/clients/mock-client.html)
 section of PHP-HTTP documentation.
 
 ## FAQ 🔮
 
 ### Where do I report issues with the client?
 
-If something is not working as expected, please open an 
+If something is not working as expected, please open an
 [issue](https://github.com/elastic/elasticsearch-php/issues/new).
 
 ### Where else can I go to get help?
 
-You can checkout the 
+You can checkout the
 [Elastic community discuss forums](https://discuss.elastic.co/).
 
 ## Contribute 🚀
 
 We welcome contributors to the project. Before you begin, some useful info...
 
-+ If you want to contribute to this project you need to subscribe to a 
+- If you want to contribute to this project you need to subscribe to a
   [Contributor Agreement](https://www.elastic.co/contributor-agreement).
-+ Before opening a pull request, please create an issue to 
+- Before opening a pull request, please create an issue to
   [discuss the scope of your proposal](https://github.com/elastic/elasticsearch-php/issues).
-+ If you want to send a PR for version `8.0` please use the `8.0` branch, for 
-  `8.1` use the `8.1` branch and so on. 
-+ Never send PR to `master` unless you want to contribute to the development 
+- If you want to send a PR for version `8.0` please use the `8.0` branch, for
+  `8.1` use the `8.1` branch and so on.
+- Never send PR to `master` unless you want to contribute to the development
   version of the client (`master` represents the next major version).
-+ Each PR should include a **unit test** using [PHPUnit](https://phpunit.de/). 
-  If you are not familiar with PHPUnit you can have a look at the 
-  [reference](https://phpunit.readthedocs.io/en/9.5/). 
+- Each PR should include a **unit test** using [PHPUnit](https://phpunit.de/).
+  If you are not familiar with PHPUnit you can have a look at the
+  [reference](https://phpunit.readthedocs.io/en/9.5/).
 
 Thanks in advance for your contribution! :heart: