Improve local setup script

[etehtsea]

• fix(local): Typo in OSTYPE matching Rename cgywin to cygwin.

• feat(local): Make OS check stricter Match exactly by linux-gnu rather than linux. Though I believe it's possible to run platform on linux-musl (Alpine Linux) the local script doesn't currently support it.

  Caveats:

  • bash isn't installed out of the box
  • binary version of Hippo isn't starting up (but hippo compiled from the sources seems to work)
  • sudo is only available in the community repo
  • consul is installed into /usr/sbin. In this case the whole script has to be run from sudo. Otherwise, consul won't be found in PATH.
• feat(local): Require sudo on linux Also, require sudo before setting the trap to avoid cleanup call.