refactor: tidy structure of source files

Fixes #79

src/protocol/errors/not-found.ts

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2019 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {NOT_FOUND} from 'http-status-codes';
+import {SCError} from '../error';
+
+/**
+ * An error that is returned when the requested route or resource was not found
+ */
+export class SCNotFoundErrorResponse extends SCError {
+  /**
+   * Create a SCNotFoundErrorResponse
+   *
+   * @param stack Set to true if a stack trace should be created
+   */
+  constructor(stack?: boolean) {
+    super('NotFoundError', 'Resource not found', NOT_FOUND, stack);
+  }
+}