use proper clean in dockerfile
update blog template
[JBDS-3209] Blogpost for JBDS8/OpenShift - Quickstarts and links to
custom cartridges
[JBDS-3209] fixed image links
[JBDS-3209] fixed another wrong image link
Adding #jbosstools-website IRC channel in notifications
Blog about Maven improvements in JBT 4.2/JBDS 8.0

Signed-off-by: Fred Bricon <fbricon@gmail.com>