feat: add new features such as database watchdog

internal/crypto/crypto.go

@@ -0,0 +1,27 @@
+package crypto
+
+import (
+	"crypto/sha512"
+	"encoding/hex"
+	"io"
+	"os"
+)
+
+func CalculateHash(p string) (string, error) {
+	f, err := os.Open(p)
+	if err != nil {
+		return "", err
+	}
+	defer f.Close()
+
+	h := sha512.New()
+	if _, err := io.Copy(h, f); err != nil {
+		return "", err
+	}
+
+	sum := h.Sum(nil)
+	// return the sha checksum in hex
+	return hex.EncodeToString(sum), nil
+	// alternatively return in base64
+	//return base64.StdEncoding.EncodeToString(sum), nil
+}