📖 Link collection code documentation

How to Write Good Documentation: https://guides.lib.berkeley.edu/how-to-write-good-documentation
How to write effective documentation for your open source project: https://opensource.com/article/20/3/documentation
Software Documentation Best Practices [With Examples]: https://helpjuice.com/blog/software-documentation
Ship it! by Jared Richardson and Will Gwaltney, Jr: https://pragprog.com/titles/prj/ship-it/
The Pragmatic Programmer (Thomas/Hunt, 2020) is a good general introduction to professional software development: Keeping code readable and easy-to-change, learning requirements, utilizing unit- and property tests, basics of securing applications: https://pragprog.com/titles/tpp20/the-pragmatic-programmer-20th-anniversary-edition/
- There is also a German translation (Der pragmatische Programmierer): https://www.hanser-fachbuch.de/fachbuch/artikel/9783446463844
Weniger schlecht Programmieren (Passig/Jander) is similar to "Pragmatic Programmer", but focuses more on code and less on projects: https://dpunkt.de/produkt/weniger-schlecht-programmieren/
Command Line Interface Guidelines are an open-source guide to help you write better command-line programs: https://clig.dev/

Tracer Bullet Development is a method to get a working version of your software quickly. This allows to evaluate code architecture and user interface early. The method is described on this website: https://growsmethod.com/practices/TracerBullets.html
Refactoring Guru has a lot of resources on common ways (patterns) of how to approach particular problems and how to improve existing code to make it easier to read and to change (refactoring): https://refactoring.guru/
12 Factor app is less about code than about running the code in a way that it can be easily and safely configured, ran and monitored. When you create your project based on modern frameworks (i.e. Laravel) it will often follow such principles: https://12factor.net/