PPIA-Traning Beta Release 1

Include Code of Conduce and CC-BY-NC license key to make it open for collaboration and open source

PPIA-Traning Alpha Release 2

Create Structure, so it looks more clean and has more proper structure

PPIA-Traning Alpha Release 1

Most of the contents in the repo are linked to another website, except for Git materials.
In the future, it may be best to make it into notes / a summary.