docs: update installation guide

doc/source/installation.rst

+.. _installation:
+
 Installation
-===============
+=============
 
-You can get a development copy of the gstlal software suite from git.  Doing this at minimum will require a development copy of lalsuite.
-  * https://git.ligo.org/lscsoft/gstlal
-  * https://git.ligo.org/lscsoft/lalsuite
+There are various ways to get started with GstLAL:
+
+  * :ref:`Install the latest release <install-release>`. Pre-built packages are available through various mechanisms.
+  * :ref:`Use a version provided in an IGWN reference distribution <install-igwn>`. This option is available to members of the International Gravitational-Wave Obervatory Network (IGWN). 
+  * :ref:`Building the package from source <install-source>`. This is needed for users who wish to contribute to the project.
+
+.. _install-release:
+
+Installing the latest release
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Docker container (recommended)
+""""""""""""""""""""""""""""""
+
+The following should pull a GstLAL container and enter an environment with GstLAL and all its dependencies pre-installed:
+
+.. code:: bash
+
+    $ docker run -it --rm containers.ligo.org/lscsoft/gstlal:latest
+
+Note that you will need `Docker <https://docs.docker.com/get-docker/>`_ installed. If that is not an option (Docker requires sudo privileges), you can instead use `Singularity <https://sylabs.io/guides/3.7/user-guide/quick_start.html>`_ in place of Docker, which is available on many shared computing resources such as XSEDE and the OSG:
+
+.. code:: bash
+
+    $ singularity run docker://containers.ligo.org/lscsoft/gstlal:latest
+
+Conda installation
+"""""""""""""""""""
+
+Install conda using the `miniconda <https://docs.conda.io/projects/conda/en/latest/user-guide/install/>`_ installer, then run:
+
+.. code:: bash
+
+    $ conda install -c conda-forge gstlal-inspiral
+
+In order to check your installation, you can use:
 
-Source tarballs for GstLAL packages and all the LIGO/Virgo software dependencies are available here: http://software.ligo.org/lscsoft/source/
+.. code:: bash
+
+    $ conda list gstlal-inspiral  # to check which version is installed
+    $ gstlal_play --help
+
+
+.. _install-igwn:
+
+IGWN distributions of GstLAL
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If you are an IGWN member and have access to shared computing resources, up-to-date GstLAL libraries are available in the set of reference software environments maintained by the IGWN Computing and Software Working Group.
+
+LIGO Data Grid (LDG)
+"""""""""""""""""""""
+
+GstLAL packages are installed and available by default on the LDG. You can start using the GstLAL library immediately:
+
+.. code:: bash
+
+    $ gstlal_play --help
+
+IGWN Conda Distribution
+""""""""""""""""""""""""
+
+GstLAL is also available on the IGWN Conda Distrubution in a variety of pre-packaged environments. For more information, see `computing.docs.ligo.org/conda/ <https://computing.docs.ligo.org/conda/>`_.
+
+.. _install-source:
+
+Building from source
+^^^^^^^^^^^^^^^^^^^^^
+
+You can get a development copy of the gstlal software suite from git.
+
+  * https://git.ligo.org/lscsoft/gstlal
 
-Limited binary packages are available here: https://wiki.ligo.org/Computing/DASWG/SoftwareDownloads 
+Source tarballs for GstLAL packages and all the LIGO/Virgo software dependencies are available here: http://software.igwn.org/lscsoft/source/
 
 Building and installing from source follows the normal GNU build procedures
 involving: