Remove installation landing page [Foxy] (#1133)

* Remove installation landing page [Foxy]

Signed-off-by: maryaB-osr <marya@openrobotics.org>

* shorten title, fix links

Signed-off-by: maryaB-osr <marya@openrobotics.org>

* Fixes to Installation links.

Signed-off-by: Chris Lalancette <clalancette@openrobotics.org>

Co-authored-by: Chris Lalancette <clalancette@openrobotics.org>

source/Installation.rst

@@ -1,13 +1,15 @@
 .. _InstallationGuide:
+.. _FoxyInstall:
 
 Installation
 ============
 
+Options for installing ROS 2 Foxy Fitzroy:
+
 .. toctree::
    :hidden:
    :glob:
 
-   Installation/Summary
    Installation/Linux-Development-Setup
    Installation/Linux-Install-Binary
    Installation/Linux-Install-Debians
@@ -21,36 +23,60 @@ Installation
    Installation/Prerelease-Testing
    Installation/DDS-Implementations
 
-ROS 2 Installation Options
---------------------------
+Binary packages
+---------------
+
+We provide ROS 2 binary packages for the following platforms:
+
+* Linux (Ubuntu Focal(20.04))
+
+ * `Debian packages <Installation/Linux-Install-Debians>`
+ * `"fat" archive <Installation/Linux-Install-Binary>`
+
+* `macOS <Installation/macOS-Install-Binary>`
+* `Windows <Installation/Windows-Install-Binary>`
+
+
+.. _building-from-source:
+
+Building from source
+--------------------
+
+We support building ROS 2 from source on the following platforms:
+
+
+* `Linux <Installation/Linux-Development-Setup>`
+* `macOS <Installation/macOS-Development-Setup>`
+* `Windows <Installation/Windows-Development-Setup>`
+
 
-Multiple distributions of ROS 2 are supported at a time.
-We recommend using the most recent release available when possible.
+Which install should you choose?
+--------------------------------
 
-Select your ROS distribution
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Installing from binary packages or from source will both result in a fully-functional and usable ROS 2 install.
+Differences between the options depend on what you plan to do with ROS 2.
 
+**Binary packages** are for general use and provide an already-built install of ROS 2.
+This is great for people who want to dive in and start using ROS 2 as-is, right away.
 
-+---------------------------------------------------------------------+-------------------------------------------------------------------+---------------------------------------------+
-| `ROS 2 Dashing Diademata <../dashing/Installation/Summary.html>`__  | `ROS 2 Eloquent Elusor <../eloquent/Installation/Summary.html>`__ | `ROS 2 Foxy Fitzroy <Installation/Summary>` |
-+---------------------------------------------------------------------+-------------------------------------------------------------------+---------------------------------------------+
-| Released May 2019                                                   | Released November 2019                                            | Released June 2020                          |
-+---------------------------------------------------------------------+-------------------------------------------------------------------+---------------------------------------------+
-| Supported until May 2021                                            | Supported until November 2020                                     | Supported until May 2023                    |
-+---------------------------------------------------------------------+-------------------------------------------------------------------+---------------------------------------------+
+Linux users have two options for installing binary packages:
 
+- Debian packages
+- "fat" archive
 
-For more detailed descriptions of each release see `REP-2000 <https://www.ros.org/reps/rep-2000.html>`_
+Installing from Debian packages is the recommended method.
+It's more convenient because it installs its necessary dependencies automatically.
+It also updates alongside regular system updates.
 
-Why you might want an older distribution
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-You may want to install an older distribution if you need ROS 2 to:
+However, you need root access in order to install Debian packages.
+If you don't have root access, the "fat" archive is the next best choice.
 
-* Operate on an older platform
-* Need a package that hasn’t been released into the latest distribution
-* Be supported for a longer period of time (the latest release isn’t necessarily supported the longest)
+macOS and Windows users who choose to install from binary packages only have the "fat" archive option
+(Debian packages are exclusive to Ubuntu/Debian).
 
-General users with no special considerations should use the most recent release available.
+**Building from source** is meant for developers looking to alter or explicitly omit parts of ROS 2's base.
+It is also recommended for platforms that don't support binaries.
+Building from source also gives you the option to install the absolute latest version of ROS 2.
 
 Contributing to ROS 2 core?
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^

source/Releases/Release-Foxy-Fitzroy.rst

@@ -31,7 +31,7 @@ For more information about RMW implementations, compiler / interpreter versions,
 Installation
 ------------
 
-`Install Foxy Fitzroy <../Installation/Summary>`
+`Install Foxy Fitzroy <../Installation>`
 
 New features in this ROS 2 release
 ----------------------------------