https://dfinity.org/
https://sdk.dfinity.org/docs/introduction/welcome.html
https://sdk.dfinity.org/docs/developers-guide/concepts/canisters-code.html
    https://smartcontracts.org/

https://github.com/dfinity/motoko

2021
https://www.joachim-breitner.de/blog/787-A_mostly_allocation-free_optional_type
Dfinity - Talk | Primer to the Internet Computer (Dominic Williams) of 7:48
    https://www.youtube.com/watch?v=YWHTNr8RZHg&list=PLuhDt1vhGcrf4DgKZecU3ar_RA1cB0vUT&index=18
2020
https://medium.com/dfinity/software-canisters-an-evolution-of-smart-contracts-internet-computer-f1f92f1bfffb