Blockchain Node deployment Story

[ashraffouda]

Acceptance Criterias

user should be able to create block chains nodes the user will be asked how many nodes he want to deploy and he will got a qr to scan to pay for those nodes

tickets

• [x] document how blockchain node is deployed on a container #19
• [x] create API endpoints https://github.com/threefoldtech/tf_jukebox/issues/18
• [x] create required SAL https://github.com/threefoldtech/tf_jukebox/issues/17