Use compose-spec parser

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

vendor/github.com/mattn/go-shellwords/util_posix.go

@@ -0,0 +1,29 @@
+// +build !windows
+
+package shellwords
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func shellRun(line, dir string) (string, error) {
+	var shell string
+	if shell = os.Getenv("SHELL"); shell == "" {
+		shell = "/bin/sh"
+	}
+	cmd := exec.Command(shell, "-c", line)
+	if dir != "" {
+		cmd.Dir = dir
+	}
+	b, err := cmd.Output()
+	if err != nil {
+		if eerr, ok := err.(*exec.ExitError); ok {
+			b = eerr.Stderr
+		}
+		return "", fmt.Errorf("%s: %w", string(b), err)
+	}
+	return strings.TrimSpace(string(b)), nil
+}