CI build (Github Actions)

[isidroas]

No description provided.

[isidroas]

Not ready, because the build is failing with the error:

$ make
cat assets/base.css | postcss --use autoprefixer --autoprefixer.browsers "last 4 versions" --use cssnano > .styles.css
Plugin Error: Cannot find package 'autoprefixer' imported from /usr/share/nodejs/postcss-cli/index.js'

evidences: https://github.com/isidroas/tmux2html/actions/runs/7593681225/job/20684407464

I don't know how to fix because I have no experience in javascript.