Enable docker service in travis
Created by: mikkeloscar
Adds the docker service in travis which is now required by arch-travis.
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Welcome to our new datacenter. The migration is still not over, but we try to bring up the service to the best we can. There are some parts not working yet (shared runners, previous job logs, previous job artifacts, ... ) but we try to do our best.
We do not guarantee data while the migration is not over, please consider this as read-only
See the migration tracker for more details on what is happening.
Created by: mikkeloscar
Adds the docker service in travis which is now required by arch-travis.