currently, there are a few urls with this pattern /docs/...
when trying to covert to pdf for this docsify project, it fails with such errors:
~~~
ERROR:
combineMarkdowns
Error: file /docs/micro-services/huifer-what's-microservice-how-to-communicate.md is not exist, but listed in summary.md
~~~
by changing "/docs/..." to "./docs/..." the export will work.
What is more, changing of the URLs make URL patterns in summary.md consistent
