Upstream ${HOME} of containers of the "Get started" stacks is set to /home/user (i.e. when opening a terminal echo $HOME returns /home/user).

As a consequence, in the docs, we take for granted that $HOME will always be `/home/user`. As an example look at "Defining Maven settings.xml file across workspaces" section. This assumption is false:

• In CRW "Get started" stacks $HOME is usually set to /home/jboss
• If a customer uses a custom stack $HOME can be set to an arbitrary folder

We should review all occurences of /home/user and replace it with $HOME specifying that its value is /home/user (Eclipse Che) or /home/jboss (CRW) for the Get started stacks.