Added migrations

internal/interfaces/api/responses/error_response.go

@@ -0,0 +1,13 @@
+package responses
+
+type ErrorResponse struct {
+	ErrorCode int    `json:"error_code"`
+	Message   string `json:"message"`
+}
+
+func CreateErrorResponse(code int, msg string) ErrorResponse {
+	return ErrorResponse{
+		ErrorCode: code,
+		Message:   msg,
+	}
+}