Add license file of OSS version

Author: noah

internal/interactor/license.go

@@ -1,3 +1,9 @@
+// Copyright 2021 Gitploy.IO Inc. All rights reserved.
+// Use of this source code is governed by the Gitploy Non-Commercial License
+// that can be found in the LICENSE file.
+
+// +build !oss
+
 package interactor
 
 import (

internal/interactor/license_oss.go

@@ -0,0 +1,13 @@
+// +build oss
+
+package interactor
+
+import (
+	"context"
+
+	"github.com/gitploy-io/gitploy/vo"
+)
+
+func (i *Interactor) GetLicense(ctx context.Context) (*vo.License, error) {
+	return vo.NewOSSLicense(), nil
+}