doc: improve GSG navigation

Feedback suggests we add more top-level navigation to the getting
started guides, so let's include a local TOC as well as using the
"numbered-step" style to top-level steps.

Signed-off-by: David B. Kinder <david.b.kinder@intel.com>

doc/getting-started/building-from-source.rst

@@ -3,9 +3,6 @@
 Build ACRN from Source
 ######################
 
-Introduction
-************
-
 Following a general embedded-system programming model, the ACRN
 hypervisor is designed to be customized at build time per hardware
 platform and per usage scenario, rather than one binary for all
@@ -40,6 +37,10 @@ the ACRN hypervisor for the following reasons:
 Build the ACRN hypervisor, device model, and tools from source by following
 these steps.
 
+.. contents::
+   :local:
+   :depth: 1
+
 .. _install-build-tools-dependencies:
 
 .. rst-class:: numbered-step

doc/getting-started/rt_industry_ubuntu.rst

@@ -3,6 +3,10 @@
 Getting Started Guide for ACRN Industry Scenario with Ubuntu Service VM
 #######################################################################
 
+.. contents::
+   :local:
+   :depth: 1
+
 Verified version
 ****************
 
@@ -23,13 +27,13 @@ Prerequisites
 - Ethernet cables
 - A grub-2.04-7 bootloader with the following patch:
 
-  http://git.savannah.gnu.org/cgit/grub.git/commit/?id=0f3f5b7c13fa9b677a64cf11f20eca0f850a2b20: multiboot2: Set min address for mbi allocation to 0x1000
+  http://git.savannah.gnu.org/cgit/grub.git/commit/?id=0f3f5b7c13fa9b677a64cf11f20eca0f850a2b20:
+  multiboot2: Set min address for mbi allocation to 0x1000
 
-Install Ubuntu for the Service and User VMs
-*******************************************
+.. rst-class:: numbered-step
 
 Hardware Connection
-===================
+*******************
 
 Connect the WHL Maxtang with the appropriate external devices.
 
@@ -42,11 +46,10 @@ Connect the WHL Maxtang with the appropriate external devices.
 
    .. figure:: images/rt-ind-ubun-hw-2.png
 
-Install the Ubuntu User VM (RTVM) on the SATA disk
-==================================================
+.. rst-class:: numbered-step
 
-Install Ubuntu on the SATA disk
--------------------------------
+Install the Ubuntu User VM (RTVM) on the SATA disk
+**************************************************
 
 .. note:: The WHL Maxtang machine contains both an NVMe and SATA disk.
    Before you install the Ubuntu User VM on the SATA disk, either
@@ -74,11 +77,10 @@ Install Ubuntu on the SATA disk
 This Ubuntu installation will be modified later (see `Build and Install the RT kernel for the Ubuntu User VM`_)
 to turn it into a real-time User VM (RTVM).
 
-Install the Ubuntu Service VM on the NVMe disk
-==============================================
+.. rst-class:: numbered-step
 
-Install Ubuntu on the NVMe disk
--------------------------------
+Install the Ubuntu Service VM on the NVMe disk
+**********************************************
 
 .. note:: Before you install the Ubuntu Service VM on the NVMe disk, either
    remove the SATA disk or disable it in the BIOS. Disable it by going to:
@@ -106,6 +108,8 @@ Install Ubuntu on the NVMe disk
    .. note:: Set ``acrn`` as the username for the Ubuntu Service VM.
 
 
+.. rst-class:: numbered-step
+
 Build and Install ACRN on Ubuntu
 ********************************
 
@@ -402,6 +406,8 @@ Follow these instructions to build the RT kernel.
       $ sudo cp -r /mnt/lib/modules/lib/modules/4.19.72-rt25 /mnt/lib/modules/
       $ sudo cd ~ && sudo umount /mnt && sync
 
+.. rst-class:: numbered-step
+
 Launch the RTVM
 ***************
 
@@ -601,6 +607,8 @@ Run cyclictest
     :-q:                             quiet mode; print a summary only on exit
     :-H 30000 --histfile=test.log:   dump the latency histogram to a local file
 
+.. rst-class:: numbered-step
+
 Launch the Windows VM
 *********************