build: expand header documentation
* 2. define the main stages of the pipeline
* 3. describe sub stages. This is where you will want to add new builds
* 4. helper section to help write build scripts
+ *
+ * General Information about Jenkinsfiles can be found at
+ * https://jenkins.io/doc/book/pipeline/jenkinsfile/.
+ *
+ * A Snipped generators is available to the public at
+ * https://qa.nuxeo.org/jenkins/pipeline-syntax/.
+ * A list of available commands on the build server can be found after a login at
+ * https://build.libelektra.org/jenkins/job/elektra-jenkinsfile/pipeline-syntax/.
*/
// FIXME sloc publish errors
