Add Docker recommendation to Getting Started (#408) (#409)

Author: mergify[bot]

doc/tutorials/getting_started/getting_started.rst

@@ -3,6 +3,8 @@ Getting Started
 
 Here we will setup your environment for best running the tutorials. This will create a Colcon workspace, download all of the latest MoveIt source code, and build everything from source to ensure you have the latest fixes and improvements.
 
+Building all the source code of MoveIt can take 20-30 minutes, depending on the CPU speed and available RAM of your computer. If you are on a less performant system, or generally just want to get started quicker, checkout our :doc:`Docker Guide </doc/how_to_guides/how_to_setup_docker_containers_in_ubuntu>`.
+
 Install ROS 2 and Colcon
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 :ros_documentation:`Install ROS 2 {DISTRO_TITLE}<Installation.html>`.
@@ -42,7 +44,7 @@ For tutorials you will need to have a :ros_documentation:`colcon <Tutorials/Colc
 
 Download Source Code of MoveIt and the Tutorials
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Move into your colcon workspace and pull the MoveIt tutorials source: ::
+Move into your Colcon workspace and pull the MoveIt tutorials source: ::
 
   cd ~/ws_moveit2/src
   git clone https://github.com/ros-planning/moveit2_tutorials -b main
@@ -57,7 +59,7 @@ The following will install from Debian any package dependencies not already in y
 
   rosdep install -r --from-paths . --ignore-src --rosdistro $ROS_DISTRO -y
 
-The next command will configure your colcon workspace: ::
+The next command will configure your Colcon workspace: ::
 
   cd ~/ws_moveit2
   colcon build --mixin release
@@ -69,7 +71,7 @@ If everything goes well, you should see the message "finished". If you have prob
 Setup Your Colcon Workspace
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Source the colcon workspace: ::
+Source the Colcon workspace: ::
 
   source ~/ws_moveit2/install/setup.bash
 
@@ -79,7 +81,7 @@ Optional: add the previous command to your ``.bashrc``: ::
 
 .. note:: Sourcing the ``setup.bash`` automatically in your ``~/.bashrc`` is
    not required and often skipped by advanced users who use more than one
-   colcon workspace at a time, but we recommend it for simplicity.
+   Colcon workspace at a time, but we recommend it for simplicity.
 
 Next Step
 ^^^^^^^^^