docs: Update readme, add Node.js 22.x

README.md

 amazonlinux2-nodejs
 ===================
 
-A GitLab pipeline to build [Node.js](https://nodejs.org/) 18.x and 20.x for Amazon Linux 2.
+A GitLab pipeline to build [Node.js](https://nodejs.org/) 18.x, 20.x and 22.x for Amazon Linux 2.
 
 Rationale
 ---------
@@ -21,6 +21,18 @@ The pipeline launches an `amazonlinux:2` container and:
 * Builds this release from source code
 * Publishes the build to this project's package registry
 
+Downloads
+---------
+
+Node.js 18.x, 20.x and 22.x builds for Amazon Linux 2 can be downloaded from the
+[Package Registry](https://code.europa.eu/ecgalaxy/amazonlinux2-nodejs/-/packages).
+
+Automated setup
+---------------
+
+See the [ECGALAXY Node.js Ansible role](https://code.europa.eu/ecgalaxy/nodejs)
+to globally install Node.js on Amazon Linux 2 and other distributions, using automation.
+
 Original work
 -------------