Example docker run command in README fails

[tcharding]

Current command given in README.md to start the mysterium node service using docker image mysteriumnetwork/myst appears to be incorrect.

sudo docker run --cap-add NET_ADMIN --net host --name myst -d mysteriumnetwork/myst service --agreed-terms-and-conditions

Current docker image mysteriumnetwork/myst does not accept flag --agreed-terms-and-conditions

Running the same command without this flag brings up the service.

[soffokl]

@tcharding Thanks for noticing it, we will fix it soon.

[soffokl]

Fixed by the following PR: #442