This lets the user control what IPFS node is used. 'local' will attempt
to locate an IPFS node on the current machine, 'spawn' will create an
ephemeral node that does default bootstrapping, and 'fallback' will try
the 'local' and then 'spawn' strategies, in that order.
This lets the user control what IPFS node is used. 'local' will attempt to locate an IPFS node on the current machine, 'spawn' will create an ephemeral node that does default bootstrapping, and 'fallback' will try the 'local' and then 'spawn' strategies, in that order.