yum:
sudo yum install texlive-collection-latex texlive-parskip texlive-titlesec
apt:
sudo apt install texlive-latex-base texlive-latex-recommended texlive-latex-extra
tlmgr init-usertree
tlmgr option repository ftp://tug.org/historic/systems/texlive/2015/tlnet-final
tlmgr install parskip
Need to create a Personal Access Token with repo and user scopes, and store as a secret called GH_TOKEN.
To purge Cloudflare cache, a CLOUDFLARE_ZONE and CLOUDFLARE_TOKEN (with the Cache Purge permission) are also needed.