DCO stuff

Deploy DCObot on our Heroku instance?

• https://github.com/probot/stale/blob/master/docs/deploy.md
• https://github.com/probot/probot/blob/master/docs/deployment.md

Replace DCObot?

• https://www.pullapprove.com/ 

Retroactive fixes (from indy)

• https://hyperledger-indy.readthedocs.io/projects/sdk/en/latest/docs/contributors/signing-commits.html