Enable Dark Mode

[joshmgross]

Closes #10

This pull request adds a configuration file to enable dark mode with the media setting and regenerates app/assets/stylesheets/tailwind.css

Since this configuration file is in the default location, the -c option isn't need for tailwindcss-cli.

This change nearly doubles the size of app/assets/stylesheets/tailwind.css, but the purging of unused classes should help with the extra bloat.

[MikeRogers0]

@joshmgross That's a lot of config in tailwind.config.js 😱

I just locally tried setting my tailwind.config.js to be:

module.exports = {
  darkMode: 'media',
}

The ran npx tailwindcss-cli@latest build -o app/assets/stylesheets/tailwind.css - That added the dark mode CSS Classes. What do you think? :)

[joshmgross]

Thanks @MikeRogers0, I didn't realize the rest could be left out 😄