License and CLA vs. DCO

[robertodr]

We should discuss which license should be applied to our code and if contributions should be accompanied by signing of a contributor license agreement or a developer certificate of origin More reading material:

• https://opensource.com/article/18/3/cla-vs-dco-whats-difference
• https://julien.ponge.org/blog/developer-certificate-of-origin-versus-contributor-license-agreements/