[BUGFIX] use canonical-path of live-server root to allow jetty serving content from a symlinked resource-base

[sjorek]

This fix allows serving from MacOS's symlinked temporary directory. MacOS symlinks /var to /private/var. The default temporary directory on MacOS is /var/folders/…, so fluentmark-rendered files can not be served on MacOS, due to jetty's AllowedResourceAliasChecker which prevents serving files from outside the resource-base.

Using the canonical-path (which includes the realpath) of the live-server's root solves this issue.

Resolves: https://github.com/grosenberg/Fluentmark/issues/73

Signed-off-by: Stephan Jorek [email protected]