updated links in documentation to github Container registry (https://…

…docs.github.com/en/packages/working-with-a-github-packages-registry/migrating-to-the-container-registry-from-the-docker-registry)

docs/index.rst

@@ -24,7 +24,7 @@ The easiest way to get started on ubuntu is to use the
 :ref:`easy setup system <easy_setup>`. This automatically installs TRAL and all
 external tools.
 
-We also provide a docker <https://github.com/acg-team/tral/packages> image with TRAL and all its third party software set up.
+We also provide a `docker image for TRAL <https://github.com/acg-team/tral/pkgs/container/tral%2Ftral_docker>`_ with all its third party software set up.
 
 Alternately, follow these steps to install each part:
 

docs/install_containerized.rst

@@ -37,20 +37,20 @@ the licenses for all software. Several tools are restricted to academic use.
 
 Docker
 ------
-Create `Github.com Token <https://help.github.com/en/github/authenticating-to-github/creating-a-personal-access-token-for-the-command-line>`_ 
-and login your docker instance:
+Create a `Github.com access token <https://help.github.com/en/github/authenticating-to-github/creating-a-personal-access-token-for-the-command-line>`_ 
+and login your docker instance (`more help <https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry>`_):
 ::
     
-    cat ~/TOKEN.txt | docker login https://docker.pkg.github.com -u USERNAME --password-stdin
+    cat ~/TOKEN.txt | docker login ghcr.io -u USERNAME --password-stdin
 
 Get the latest docker image:
 ::
 
-    sudo docker docker pull docker.pkg.github.com/acg-team/tral/tral_docker:latest
+    sudo docker pull ghcr.io/acg-team/tral/tral_docker:2.0
 
 Fire it up:
 ::
     
-    sudo docker run -ti docker.pkg.github.com/acg-team/tral/tral_docker
+    sudo docker run -ti ghcr.io/acg-team/tral/tral_docker:2.0
 
-For development check the :ref:`realease procedure <contribute>`.
+For development check the :ref:`release procedure <contribute>`.