Create a local IPFS network

[jpraynaud]

Why

The IPFS PoC needs a reproducible local environment to develop and test artifact upload and download without depending on the public IPFS network.

What

Add a local IPFS network to the ipfs-devnet with a configurable number of nodes.

How

• Add an IPFS node configuration usable in ipfs-devnet
• Support a configurable number of nodes
• Connect the nodes together into a private local network
• Document how to start and use the local IPFS network