configure remote reposities localtion and add existing md file into wikjs

[lenged]

Actual behavior

1. What should be set of the git remote reposity field in the config.yml, when I want use the local disk git repositity as the project remote reposity
   can I use git remote add command in the ./repo directory to set remote reposity?

2. How can I add existing md file into wiki engine ? I use git add, git commit command add a new md file into ./repo directory, but it can not show in browser