Delete stuff about Jekyll page, re-arrange files.

.gitlab-ci.yml

.gitmodules

Gemfile

Gemfile.lock

README.md

Readme.md

_config.yml

_includes/footer.html

_includes/head.html

_includes/header.html

_includes/icon-github.html

_includes/icon-github.svg

_includes/icon-license-CC0.html

_includes/icon-license-CC0.svg

_includes/icon-twitter.html

_includes/icon-twitter.svg

_layouts/default.html

_layouts/page.html

_layouts/post.html

_posts/2019-09-04-welcome-to-our-construction-site.markdown