Feature: show Alpine version at start

internal/alpine/version.go

@@ -0,0 +1,27 @@
+package alpine
+
+import (
+	"context"
+	"io"
+	"os"
+	"strings"
+)
+
+func (c *configurator) Version(ctx context.Context) (version string, err error) {
+	file, err := c.openFile("/etc/alpine-release", os.O_RDONLY, 0)
+	if err != nil {
+		return "", err
+	}
+
+	b, err := io.ReadAll(file)
+	if err != nil {
+		return "", err
+	}
+
+	if err := file.Close(); err != nil {
+		return "", err
+	}
+
+	version = strings.ReplaceAll(string(b), "\n", "")
+	return version, nil
+}