feat(mage): shutdown an environment

Add a mage target for shutting down an entire environment.

magefiles/shutdown.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/magefile/mage/sh"
+)
+
+func Shutdown(environment string) error {
+	os.Setenv("MAGEFILE_VERBOSE", "true")
+
+	cfg, err := newConfig(environment)
+	if err != nil {
+		return fmt.Errorf("unable to load the configuration; %w", err)
+	}
+
+	os.Setenv("DOCKER_HOST", cfg.Docker.Host)
+
+	command := []string{
+		"docker",
+		"compose",
+		"--project-directory",
+		fmt.Sprintf("%s/%s/compose", rootBuildDir, environment),
+		"down",
+	}
+
+	return sh.Run(command[0], command[1:]...)
+}