Includes gui and cli options, but as far as I can see not more involved setups like https://github.com/jonaswinkler/paperless-ng .

An absolutely amazing guide and introduction into NodeRED programming (and the idea of flow-based and IoT programming in general).

It is sorted by examples and the chapters go deep into creating useful flows. Really, really good.

A quick overview on how to handle async processes in luv in Neovim.

Uses example of spawning a pandoc process, which is a good example starting point for reviewing implementations.

JSONata query and transformation language. Small introduction.