to avoid needlessly building/pushing images

Fixes #14

start: be more accepting of output from `minikube service`, and check array length to avoid panic. Fixes #17

Issue #16

Trades Quay -> Nexus repo for swagger-ui

See merge request !12

use :devtool as a tag in all images to avoid pushing a new image into KinD on every build, even when there are no changes

ci: flag requirements are shared. marking a flag as required on one command makes it required for all child commands, so only define image-tag within the subcommands that need it

ci wait: multiple logical fixes, add flags for project-name, tag, sha, add more informational output