Use Docker API instead of shelling out

[johnharris85]

Saw this in the TODO list and happy to take a crack at it if no one else is working on it?

[lizrice]

That would be wonderful @johnharris85!

[johnharris85]

So was taking a look at this, and there is a lot of work done by the cli itself around authentication, notary, etc... before calling the API. What do you think is the best approach? Duplicate some (bits required) of that code in manifesto and use the API, or just create a cli instance and use that?

[lizrice]

Hi @johnharris85 and sorry to take so long to get back on this! I don't have any concerns about using a cli instance if that's going to be the easiest approach. It might well bring us some additional benefits e.g. we'll be that much closer to experimenting with Notary signing the metadata too. Thanks!