Describe the bug
The post-icon URL is not correct when used with a <base href="/" />.
The URL is then "http://my-domain.ch//2000.svg".

Expected behavior
The URL should be "http://my-domain.ch/2000.svg".

In general, icon URLs should be constructed as:
current domain + base[href] + meta[name="design-system-settings"][data-post-icon-base]) (overridden by a potential base property set on the component)
If the base[href] is not relative, it is instead of current domain + base[href].
If the meta[name="design-system-settings"][data-post-icon-base]) (or the base prop) is not relative, it is used as is.