"getting started" documentation is out of date

[jlopp]

I ran into a few issues while trying to follow the instructions at https://github.com/block-core/blockcore/blob/master/Documentation/getting-started.md

1. Blockcore requires .NET 6.0 SDK, which I had to install
2. Blockcore requires librocksdb-dev on debian/ubuntu which I had to install via apt
3. The actual project directories are different than the Stratis project from which it was forked

[dangershony]

Hi @jlopp we'll update the documentation and bring it up to date, I will update here when it's done.

Yeah the datadir is different then stratis.
It's under .blockcore now