Building lockc

The first step to try out lockc is to build it. There are several ways to do that:

• Cargo - build binaries with Cargo (Rust build system) on the host
  • convenient for local development, IDE/editor integration
• Container image - build a container image which can be deployed on Kubernetes
  • the only method to try lockc on Kubernetes
  • doesn't work for Docker integration, where we rather install lockc as a binary on the host, managed by systemd