The software documentation is hosted on the web

This a guideline that follows from the early stage of the documentation, once the README file (#36) and/or the codebase becomes too large.

The software documentation, whatever the format (eg: pdf, markdown, etc...) must be hosted and accessible on the web.

In practice, it is recommended to use a webpages generating system to host a documentation online. This is fairly easy to implement since many online services can directly be plugged onto a git-based repository content.

Such online documentation systems are, for instance:
- [Read The Docs](https://about.readthedocs.com/) (free for open-source project),
- [Github Pages](https://docs.github.com/en/pages).

These services can be used to publish online a documentation that is possibly generated from static files located in a dedicated folder of the software repository.

Such documentation (based on static files like markdown or rst) can be generated with, for instance:
- [Sphynx](https://www.sphinx-doc.org/en/master/),
- [Mkdocs](https://www.mkdocs.org/),
- [Jupyter Books](https://jupyter-book.readthedocs.io/v1/intro.html).

💡 Euroargodev provides a [repository template for a documentation](https://github.com/euroargodev/online_documentation) that can be used to quickly start your own online documentation.