add a root url for corpus back apis. it is set to the same than root api for the moment
{{#if isSubjectLink}}
<a href="{{url}}" target="_blank" title={{url}} class="bo-doc-ref-link doc-link-bnf">
{{#if resolvedLabel}}{{resolvedLabel}}{{else}}{{code}}{{/if}}
</a>
{{else}}
{{#if resolvedLabel}}{{resolvedLabel}}{{else}}{{code}}{{/if}}
{{/if}}