Scalable PKIs

[alexey-gruzdev]

In avoid manual copying for current PKIs/certificate exchange between Aggregator & Collaborators we need an automatic system for that.

[maradionov]

We decide to use 3dparty utility - step-ca and client for it. This utilities are written on Go language, so we download binaries from github repoes while deployment. Step-ca allows you to make the process of exchanging certificates semi-automatic, using token, the node can receive a certificate from the CA server via https, but the token is copied manually, along with the ca root certificate. General pki pipeline is presented on this diagramm. There is implementation pr