Client in docker unable to create interface

[0x1a8510f2]

Describe the bug
When running a client in Docker, it is unable to create an interface to route traffic through.

To Reproduce
Steps to reproduce the behavior:

1. Run the docker image as a client
2. Connect to a network
3. Notice a lack of Drago interface

Expected behavior
The interface should be created regardless

Additional context
I believe this is purely down to a lack of some volumes being passed through to the container, in which case this is just a small documentation issue. This could be of use: https://github.com/gravitl/netmaker/blob/master/compose/docker-compose.reference.yml#L15

[0x1a8510f2]

Closing in favour of #68