Add Elasticsearch 7.9 as config version option (#8615)

Co-authored-by: Bruce Denham <[email protected]>

Author: carlos-reynosa

src/cloud/docker/docker-containers.md

@@ -44,7 +44,7 @@ The following table shows the options to customize service container configurati
 | Name       | Service   | Key & options  | Available Versions | Notes
 | ------------- | ---------- | ---------- | ------------------ |------------------
 | [db] | MariaDB or MySQL<br>     | `--db`, `--db-image` (MySQL)<br>`--expose-db-port`<br>`--db-increment`<br>`--db-offset`<br>`--with-entrypoint`<br>`--with-mariadb-config`|10.0, 10.1, 10.2<br>5.6, 5.7 | Use the increment and offset options to customize the [auto-increment settings][Using AUTO_INCREMENT] for replication.<br><br>Use the `--with-entrypoint` and `--with-mariadb-config` options to automatically configure database directories in the Docker environment<br><br>*Example build commands:*<br>`ece-docker build:compose --db <mariadb-version>`<br>`ece-docker build:compose --db <mysql-version> --db-image`
-| [elasticsearch] | Elasticsearch | `--es`<br>`--es-env-var`<br>`--no-es` | 1.7, 2.4, 5.2, 6.5, 6.8, 7.5, 7.6, 7.7 | Use the options to specify the Elasticsearch version,  customize Elasticsearch configuration options, or to build a Docker environment without Elasticsearch.
+| [elasticsearch] | Elasticsearch | `--es`<br>`--es-env-var`<br>`--no-es` | 1.7, 2.4, 5.2, 6.5, 6.8, 7.5, 7.6, 7.7, 7.9 | Use the options to specify the Elasticsearch version,  customize Elasticsearch configuration options, or to build a Docker environment without Elasticsearch.
 | [fpm][fpm-container] | PHP FPM | `--php`<br>`--with-xdebug` | 7.0, 7.1, 7.2, 7.3, 7.4 |  Used for all incoming requests. Optionally, install a specific php version or add Xdebug to debug PHP code in the Docker environment.
 | [fpm_xdebug][fpm_xdebug-container] | Xdebug | `--set-docker-host` | latest | Optional container for PHP debugging<br>On Linux systems, `--set-docker-host` sets the `.host.docker.internal` value in the container `/etc/hosts` file.
 | [mailhog][mailhog-container] | MailHog |  `--no-mailhog`<br>`--mailhog-http-port`<br>`--mailhog-smtp-port` | latest | Email service to replace Sendmail service, which can cause issues in Docker environment