jekyll: Css not loading even locally

gem install jekyll bundler
jekyll new my-awesome-site
cd my-awesome-site
bundle install
bundle exec jekyll >> 3.2.1
bundle exec jekyll serve

When visiting 127.0.0.1, I have a 404 on http://example.com/css/main.css.

Digging in minima/_includes/head.html code, I’ve found this :

{% assign custom_url = site.url | append: site.baseurl %}
{% assign full_base_url = custom_url | default: site.github.url %}
<link rel="stylesheet" href="{{ "/css/main.css" | prepend: full_base_url }}">
<link rel="canonical" href="{{ page.url | replace:'index.html','' | prepend: full_base_url }}">
<link rel="alternate" type="application/rss+xml" title="{{ site.title | escape }}" href="{{ "/feed.xml" | prepend: full_base_url }}">

Is appending site.url better than simply appending base.url ? For now, this breaks user experience.

First, I have to understand the bug. I do, but many users will have some difficulties to get it.

And now, if I want to watch my site locally, I have to set url to 127.0.0.1 and if I want to send to production on another server than gh-pages, I have to set the production url in order to get my assets loaded.

In good old times, setting base.url was the only thing to do to get it working both locally and in production. url was the production server url and that was ok.

Hiding things in order to simplify user’s life ? I don’t buy gem based templates.