SPIKE: Faster devnet startup in epoch 3.0

[smcclellan]

The devnet currently takes over a minute to start up, with built-in delays and several burn blocks needing to be processed. This is inefficient & creates a slow feedback loop for development.

One possible idea for making this quicker is to utilize snapshotting, storing the chainstate in the docker image.

Other features that might be useful here but may be outside initial scope are the ability to Save a chainstate and Load a chainstate.

Actions:

• Experiment with docker volumes, see if we can save chainstate
  • Move all devnet data to write to same volume
• Test devnet shutdown & startup ability
• If it works:
  • Snapshot from docker volume
• Download chainstate, see if it can be imported to devnet

@hugocaillard to add any extra details.

[smcclellan]

Updated to a Spike to do an initial pass to determine what is required for this.