feat: complete OCI registry implementation with docker push/pull support

A lightweight OCI (Open Container Initiative) registry implementation written in Go.

pkg/database/db/init.go

@@ -0,0 +1,27 @@
+package db
+
+import (
+	"context"
+	"path/filepath"
+
+	"github.com/glebarez/sqlite"
+	"gorm.io/gorm"
+)
+
+var (
+	Default *gorm.DB
+)
+
+func Init(ctx context.Context, dataDir string) error {
+	var (
+		err    error
+		dbPath = filepath.Join(dataDir, "cluster.db")
+	)
+
+	Default, err = gorm.Open(sqlite.Open(dbPath), &gorm.Config{})
+	if err != nil {
+		return err
+	}
+
+	return nil
+}