WSL2 clarification (#1567)

* add network troubleshooting hint

Author: mr-c

README.rst

@@ -116,9 +116,12 @@ MS Windows users
 
 1.  Install `"Windows Subsystem for Linux 2" (WSL2) and Docker Desktop <https://docs.docker.com/docker-for-windows/wsl/#prerequisites>`_
 2.  Install `Debian from the Microsoft Store <https://www.microsoft.com/en-us/p/debian/9msvkqc78pk6>`_
-3.  Set Debian as your default WSL 2 distro: ``wsl --set-default debian``
-4.  Reboot if you have not yet already.
-5.  Launch Debian and follow the Linux instructions above (``apt-get install cwltool`` or use the ``venv`` method)
+3.  Set Debian as your default WSL 2 distro: ``wsl --set-default debian``.
+4.  Return to the Docker Desktop, choose `Settings → Resources → WSL Integration <https://docs.docker.com/desktop/windows/images/wsl2-choose-distro.png>`_ and under "Enable integration with additional distros" select "Debian",
+5.  Reboot if you have not yet already.
+6.  Launch Debian and follow the Linux instructions above (``apt-get install cwltool`` or use the ``venv`` method)
+
+Network problems from within WSL2? Try `these instructions <https://github.com/microsoft/WSL/issues/4731#issuecomment-702176954>`_ followed by ``wsl --shutdown``.
 
 ``cwltool`` development version
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^