Update introduction and sys reqs

- Reword introduction
- Increasing hardware requirements

Author: DavidePrincipi

introduction.rst

@@ -5,20 +5,21 @@ Introduction
 About NethServer 8
 ==================
 
-NethServer 8 (abbreviated as NS8) is a `GNU/Linux
-<https://en.wikipedia.org/wiki/Linux>`_ application server designed for
-small offices and medium enterprises. Applications can be managed from a
-simple Web user interface.
-
-Under the hood, NS8 is a container `orchestrator
-<https://en.wikipedia.org/wiki/Orchestration_(computing)>`_. It can host
-different :ref:`applications <applications-section>` on a single machine
-or spread the load across multiple nodes.
-
-NS8, is the evolution of `NethServer 7
-<https://docs.nethserver.org/en/v7/>`_. It is no longer a complete Linux
-distribution based on CentOS, instead it can be installed on different
-Linux distributions.
+NethServer 8 (NS8) is an application server specifically designed for
+small offices and medium enterprises. It facilitates the management of
+applications through a user-friendly web interface. NS8 operates as a
+container orchestrator, a system that can manage and coordinate the
+deployment of various applications.
+
+One of its key features is the ability to host different applications on a
+single machine or distribute the workload across multiple nodes. This
+flexibility allows for efficient resource utilization and scalability
+based on the organization's needs.
+
+NS8 represents the evolution of NethServer 7, which was a complete Linux
+distribution based on CentOS. However, NS8 departs from this model and can
+now be installed over different Linux distributions, providing users with
+more choices and compatibility options.
 
 Get support
 ===========

system_requirements.rst

@@ -4,22 +4,22 @@
 System requirements
 ===================
 
-NethServer 8, abbreviated as NS8, can be deployed on a single node or
-across multiple nodes in a clustered configuration.
-
-NS8 is currently available only for `x86-64 architecture
-<https://en.wikipedia.org/wiki/X86-64>`_.
+NethServer 8 (NS8) can be deployed on a single node or across multiple
+nodes. In both cases it is called "cluster".
 
 Minimum hardware requirements for a single node installation:
 
-- 2 vCPU/cores
+- 2 vCPU/cores, x86-64 architecture
 - 2GB RAM
 - 20GB disk
 
 More nodes can be added later, and when adding a new node, it is
 recommended to use similar hardware and the same Linux distribution
 installed on the other nodes.
 
+The above requirements must be increased to match users, applications, and
+load needs.
+
 .. _supported-distros-section:
 
 Linux distribution
@@ -28,7 +28,7 @@ Linux distribution
 Install NS8 on a clean Linux server distribution, avoiding installation on
 desktop systems or servers already running other services.
 
-Supported GNU/Linux distributions and versions:
+Supported Linux distributions and versions:
 
 - `Rocky Linux <https://rockylinux.org/>`_ 9
 - `CentOS Stream <https://www.centos.org/centos-stream/>`_ 9