meli up fails on a new machine

[komuw]

meli -up
panic: runtime error: index out of range

goroutine 1 [running]:
github.com/komuw/meli/api.GetAuth()
/home/komu/go/src/github.com/komuw/meli/api/auth.go:66 +0x1c8b
main.main()
/home/komu/go/src/github.com/komuw/meli/main.go:58 +0x531

[komuw]

probably has to do with the fact that ~/.docker/config.json may not exist or may be empty.

We should fail gracefully and fallback to just using public dockerhub

[komuw]

the issue here seems like it is same as; #64 , so closing this one