Improve redis container notes

Author: relliv

resources/docs/dev/get-started/containers.md

@@ -30,6 +30,8 @@ By default we are using official [PostgreSQL](https://www.postgresql.org/) as da
 
 By default we are using official [Redis](https://redis.io/) as cache and session driver. You can modify the container configuration in the docker-compose files or remove the redis service if you don't need it.
 
+[PhpRedis](https://github.com/phpredis/phpredis) extension is required for Redis support. By the official [Laravel Redis Docs](https://laravel.com/docs/12.x/redis#introduction) suggestion we are using as PHP extension. This extension is installed with Dockerfiles.
+
 <a name="docker-compose"></a>
 
 ## 🔸 Docker Compose

resources/docs/dev/get-started/techstack.md

@@ -16,6 +16,7 @@ To work with this starter you need to have the following tools installed on your
 - [Git](https://git-scm.com/): Version control system
 - [Docker](https://www.docker.com/): Containerization platform
 - [PHP](https://www.php.net/): Optional, docker container has own PHP setup
+- [Redis](https://redis.io/): Redis is an in-memory key–value database
 - [Node.js](https://nodejs.org/): Optional, docker container has own Node.js setup
 - [Composer](https://getcomposer.org/): Optional, docker container has own composer