group "default" { targets = ["db", "webapp"] } group "release" { targets = ["db", "webapp-plus"] } target "db" { context = "./" tags = ["docker.io/tonistiigi/db"] } target "webapp" { context = "./" dockerfile = "Dockerfile.webapp" args = { buildno = "123" } } target "cross" { platforms = [ "linux/amd64", "linux/arm64" ] } target "webapp-plus" { inherits = ["webapp", "cross"] args = { IAMPLUS = "true" } }