docs add adr

Author: Paul-B98

README.md

@@ -56,3 +56,6 @@ This project uses [arc42](https://docs.arc42.org/home/) to document the requirem
 1. [Quality Requirements](docs/arc/quality.md)
 1. [Risks and Technical Debt](docs/arc/risks.md)
 1. [Glossary](docs/arc/glossary.md)
+
+- https://www.conventionalcommits.org/en/v1.0.0/
+- https://adr.github.io/

docs/arc/decisions.md

@@ -1,3 +1,5 @@
 # Architecture Decisions
 
+A tool for documenting architectural decisions could be an [architecture decision record](https://adr.github.io/).
+
 For more information, please refer to the [arc42](https://docs.arc42.org/section-9/) documentation.