fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-UBUNTU2210-COREUTILS-3083834
- https://snyk.io/vuln/SNYK-UBUNTU2210-SYSTEMD-5721329
- https://snyk.io/vuln/SNYK-UBUNTU2210-SYSTEMD-5721329
- https://snyk.io/vuln/SNYK-UBUNTU2210-SYSTEMD-5721343
- https://snyk.io/vuln/SNYK-UBUNTU2210-SYSTEMD-5721343

Dockerfile

@@ -29,7 +29,7 @@ RUN cmake -DBUILD_ALL=ON .. && make
 #FROM alpine:latest as release    # hitting a segfault during startup of some playground programs
 #FROM debian:buster-slim as release
 #FROM ubuntu:22.10 as release
-FROM ubuntu:kinetic as release
+FROM ubuntu:lunar-20231004 as release
 LABEL Theodore Omtzigt
 
 #RUN apk add --no-cache libc6-compat libstdc++ cmake make bash gawk sed grep bc coreutils