Create Dockerfile about invoiceninja

[hillelcoren]

This looks great. I hadn't heard of docker before.

[rollbrettler]

I've created a Dockerfile for Invoice Ninja. Right at the moment it uses the invoice-ninja repository as a submodule. I think it is easy to implement, but it also need some more testing.

[hillelcoren]

Amazing, thanks!!

I'll add a link the project in the readme.

[hillelcoren]

@rollbrettler

I just wanted to let you know that we've created a repo with Docker files: https://github.com/invoiceninja/dockerfiles

Thanks again for your help!

[rollbrettler]

👍