omit kubectl binary in build trivy scans

fix release job in gh actions

fixed README badges

fixed bad logic with TREAT_ERRORS_AS_READY var

fixed curl version

changed curl version to one that can be found in alpine repo

fixed typos and grammar in Readme and --help

fixed docker push without a tag pushed all images on the machine to d…

…ocker hub

upgrade kubectl to version v1.11.0

fixed extra space in messages when KUBECTL_ARGS is not set