Async Ticket Server

This is my solution for the final exercise of Mainmatter's 100 Exercises to Learn Rust.

You can find my other solutions in the working branch of my fork.

Requirements

• Rust (follow instructions here).
  If rustup is already installed on your system, run rustup update (or another appropriate command depending on how you installed Rust on your system) to make sure you're running on the latest stable version.