Add/local cdk node (#614)

* Create setup-local-validium-node.md

* Rename setup-local-node.md to setup-local-rollup-node.md

* Update setup-local-rollup-node.md

* Pics via upload

* Additzion to setup-local-validium-node.md

* Fix brackets

* Fix brackets 2

* Some.

* Additional updates

* Final updates

* Final update rollup

* Update headline

* Post replica1

* Post replica 2

Author: mc2eqe