Migration of data from old Octopub to nu Octopub

[peterkwells]

Old datasets do not appear to have been migrated. See:

https://twitter.com/Ox1Digital/status/1021996431471722496

[olivierthereaux]

It's worth separating two things:

• For instances of octopub (e.g. http://fsa-octopub.herokuapp.com/) we indeed ought to have a migration script. @caiwilliamson has been thinking about that.
• For octopub.io, we made the decision to not port everything wholesale, as most of the data were tests and experiments, and there was a lot of cruft in there. Instead we chose to keep the old octopub instance alive for the next ~ 6 months and proactively start a conversation with people who we know have been actively using old-octopub and understand whether/why they would need to migrate to the new system... as well as make sure they understand that the instance is provided as-is, with no official support, that we may take it in strange directions through some of our experiments, etc.

For both: datasets already published on github will of course stay there, regardless of what happens to octopub, and be manageable from there.