modify gitignore for macOS
Merge branch 'master' of https://github.com/ahcyd008/slim-demo

merge from master
Merge branch 'master' of https://github.com/ahcyd008/slim-demo
Merge branch 'master' of https://github.com/ahcyd008/slim-demo
Merge branch 'master' of https://github.com/ahcyd008/slim-demo
Merge branch 'master' of https://github.com/ahcyd008/slim-demo
Merge branch 'master' of https://github.com/ahcyd008/slim-demo
Merge branch 'master' of https://github.com/ahcyd008/slim-demo