Use correct target dir in polkadot readme

[skunert]

Closes #1372

This fixes the target directories in the polkadot readme. I verified manually the Ubuntu based install works on a fresh cloud machine. Build from source also worked as described.

Since #1304 landed --dev also works again (not on v1.1.0 though), so I would consider the install instructions fixed.

[ggwpez]

Thanks for looking into this. Maybe @wentelteefje or someone from the @paritytech/docs-audit can jump in as well.

[ggwpez]

curl https://getsubstrate.io -sSf | bash -s -- --fast

DQ but do you know where / how this is maintained? It mentions the old Substrate repo in the code.

[skunert]

I have no idea. In the substrate README we are linking to https://docs.substrate.io/install/, which is probably a good idea here too, since the build environment and requirements for polkadot should not be different from what is described there. This getsubstrate stuff can be removed then.

[skunert]

I updated the readme and removed a lot of outdated stuff.

• That we separated polkadot and substrate in 2018 (ancient history by tech standards)
• init.sh and links to outdated getsubstrate.io removed
• Build-environment instructions removed, since the build env is the same as for substrate, I linked to the substrate docs. The readme assumes users prepare their env and focuses on the polkadot-repo specific things

[ggwpez]

Thanks! I think this cleanup was much needed.

[kureus]

What's the rationale behind deleting polkadot/scripts/init.sh, this would appear to be intentional? However it's still referenced in the Build from source section in the readme and in the wiki

[ggwpez]

What's the rationale behind deleting polkadot/scripts/init.sh, this would appear to be intentional? However it's still referenced in the Build from source section in the readme and in the wiki

Its not needed anymore. Standard rust stable should be enough. But yea, the other places should be fixed.
cc @Rashmirreddy