Cleanup

• Updated base to BigBang release 1.31.0

• Updated all dsop.io references to dso.mil

• Corrected nodeport ingress instructions

• Updated aws elb command in terraform readme

• Updated RKE2 to latest terraform, which supports Terraform 4.x and Kubernetes 1.22

• Closes #26 (closed)

• Closes #25 (closed)

• Closes #18 (closed)

• Closes #23 (closed)