Update user guide (#251)

docs/Matter_TH_User_Guide/Matter_TH_User_Guide.adoc

@@ -84,6 +84,7 @@ endif::[]
 | 23          | 26-Fev-2024  | [Apple]Carolina Lopes               | * Added volume mapping for data model XML files on docker run commands for SDK containter.
 | 24          | 27-Fev-2024  | [Apple]Carolina Lopes               | * Updated mapping in docker run command for SDK container.
 | 25          | 17-Apr-2024  | [Apple]Hilton Lima                  | * Updated Test Harness links related to final release of Spring 2024.
+| 26          | 18-Apr-2024  | [Apple]Hilton Lima                  | * Update section TH installation without a Raspberry Pi.
 |===
 
 <<<
@@ -172,7 +173,7 @@ Refer to <<bringing-up-of-matter-node-dut-for-certification-testing, Section 5,
 
 For hobby developers who want to get acquainted with certification tools/process/TC’s, can spin DUT’s using the example apps provided in the SDK. Refer to the instructions to set up one https://groups.csa-iot.org/wg/matter-csg/document/folder/2756[here].
 
-TH runs on Ubuntu 22.04 Server LTS. The official installation method uses a Raspberry Pi (<<fresh_install>>), but there's an alternative method used in the tool's development that uses a virtual machine instead (<<th-installation-without-a-raspberry-pi>>). Keep in mind that thread networking is not officially supported in VM installations at the moment.
+TH runs on Ubuntu Server 22.04 LTS (64-bit). The official installation method uses a Raspberry Pi (<<fresh_install>>), but there's an alternative method used in the tool's development that uses a virtual machine instead (<<th-installation-without-a-raspberry-pi>>). Keep in mind that thread networking is not officially supported in VM installations at the moment.
 
 [#fresh_install]
 === TH Installation on Raspberry Pi
@@ -300,19 +301,28 @@ The above command might take a while to get executed, wait for 5-10 minutes and
 
 The official installation method uses a Raspberry Pi (<<th-image-installation-on-raspberry-pi>>). **This alternative installation method is targeted for development purpose and it only supports onnetwork pairing mode.**
 
-To install TH without using a Raspberry Pi you'll need a machine with Ubuntu 22.04 Server LTS. You can <<create-an-ubuntu-virtual-machine, create a virtual machine>> for this purpose, but be aware that if the host's architecture is not arm64 you'll need to <<substitute-the-sdks-docker-image-and-update-sample-apps, substitute the SDK's docker image>> in order for it to work properly.
+|===
+|To install TH without using a Raspberry Pi you'll need a machine with Ubuntu Server 22.04 LTS (64-bit). You can <<create-an-ubuntu-virtual-machine, create a virtual machine>> for this purpose, but *be aware that if the host's architecture is not arm64* you'll need to substitute `backend`, `frontend` and <<substitute-the-sdks-docker-image-and-update-sample-apps, the SDK's docker image>> in order for it to work properly.
+|===
+
+|===
+|Images for linux/amd64 will not always be available in the github registry. So, if necessary, the images needed to be built locally.
+|===
 
 ==== Create an Ubuntu virtual machine
 
 Here's an example of how to create a virtual machine for TH using multipass (https://multipass.run/).
+|===
+|Please make sure the docker images are compatible with the host architecture.
+|===
 
 * Install multipass
 
 |===
 |`brew install multipass`
 |===
 
-* Create new VM with Ubuntu 22.04 (2 cpu cores, 8G mem and a 50G disk)
+* Create new VM with Ubuntu Server 22.04 LTS (64-bit) (2 cpu cores, 8G mem and a 50G disk)
 
 |===
 |`multipass launch 22.04 -n matter-vm -c 2 -m 8G -d 50G`