add server to monorepo.

packages/server/src/models/Option.ts

@@ -0,0 +1,30 @@
+import TenantModel from 'models/TenantModel';
+import definedOptions from '@/data/options';
+
+
+export default class Option extends TenantModel {
+  /**
+   * Table name.
+   */
+  static get tableName() {
+    return 'options';
+  }
+
+  /**
+   * Validates the given options is defined or either not.
+   * @param {Array} options 
+   * @return {Boolean}
+   */
+  static validateDefined(options) {
+    const notDefined = [];
+
+    options.forEach((option) => {
+      if (!definedOptions[option.group]) {
+        notDefined.push(option);
+      } else if (!definedOptions[option.group].some((o) => o.key === option.key)) {
+        notDefined.push(option);
+      }
+    });
+    return notDefined;
+  }
+}