This video explains how to set up a private network of multiple Geth nodes in docker container. An Ethereum network is a private network where the nodes are not connected to the main network. however there are connected each others thought configuration file based in every nodes data folder.

Link to source code:

https://github.com/et-taousy/ethereum…

Medium article:

https://medium.com/@zouhirtaousy/buil…

source