Update docs with new path. Adds docker service example. (#784)
Update docs with new path. Adds docker service example. (#784)

* Update README with new path

Change /etc/opsdroid reference to /root/.config/opsdroid.

* Add docker service option

Use docker service as another deployment option.
Use docker config for configuration.yaml.

* jacobtomlinson suggested changes

* Map folder instead of file to keep changes
* Removed `ro` option, folder must be writeable
* Update docker service with a docker volume option too

opsdroid/opsdroid,FabioRosado/opsdroid,jacobtomlinson/opsdroid