target "ghaction-docker-meta" {} group "default" { targets = ["db", "app"] } group "release" { targets = ["db", "app-plus"] } target "db" { context = "./test" tags = ["docker.io/tonistiigi/db"] } target "app" { inherits = ["ghaction-docker-meta"] context = "./test" dockerfile = "Dockerfile" args = { name = "foo" } } target "cross" { platforms = [ "linux/amd64", "linux/arm64", "linux/386" ] } target "app-plus" { inherits = ["app", "cross"] args = { IAMPLUS = "true" } }