added REDMINE_RELATIVE_URL_ROOT configuration option
Merge branch 'addRelativeURLOption' of https://github.com/k-kagurazaka/docker-redmine into k-kagurazaka-addRelativeURLOption
Merge branch 'k-kagurazaka-addRelativeURLOption'
fix indentation after merge
fix relative root access with the trailing '/' character

if REDMINE_RELATIVE_URL_ROOT was configured (e.g. /redmine), the application
was not accessible at http://redmine.local.host/redmine. The trailing '/'
character was required.

This commit fixes this issue.
fix nginx static route handling
clean up
clean up REDMINE_RELATIVE_URL_ROOT code
update changelog