My Hugo theme liquorice was updated yesterday to add simple support for Taxonomies. Both categories and tags is supported both as list view and as the ingress part of a single article.
In order to use it you need to configured in your site configuration (see documentation), in TOML this is basically adding:
[indexes]
category = "categories"
tag = "tags"
You then add the categories and / or tags per article in the front-matter like:
+++
Categories = ["Hugo"]
Description = "Taxonomies in liquorice"
Tags = ["liquorice"]
...
+++
Liquorice supports either both categories and tags, only one or neither of them.