Add support for DOGE

[ClemensLey]

First, have a look at the PRs for the Pepecoin integration:
#227

• Create a Doge docker image. We can get started with this Dockerfile. The author is using intel architecture, we will need to change it (dogecoin-1.14.7-arm-linux-gnueabihf.tar.gz. For now we can try with arm. Later we can create a Doge multiplatform docker image.
• Create a file /chain-setup/DOGE/regtest/.env.example and dogecoin.conf.example file, use pepe as inspiration
• Modify NakamotJS with the network configuration for DOGE. We have to search online, or ask in a DOGE coin social media group

NOTES:

• Information related to the node config variables: https://dogecoin.com/dogepedia/how-tos/operating-a-node/
• BitcoinJS example on Network configuration: Amirh24/bitcoinjs-dogecoin-lib@5adbe42

[ltardivo]

Included in #322.