add server to monorepo.

packages/server/src/api/middleware/FeatureActivationGuard.ts

@@ -0,0 +1,18 @@
+import { Request, Response } from 'express';
+import { Features } from '@/interfaces';
+
+export const FeatureActivationGuard =
+  (feature: Features) => (req: Request, res: Response, next: Function) => {
+    const { settings } = req;
+
+    const isActivated = settings.get({ group: 'features', key: feature });
+
+    if (!isActivated) {
+      return res.status(400).send({
+        errors: [
+          { type: 'FEATURE_NOT_ACTIVATED', code: 20, payload: { feature } },
+        ],
+      });
+    }
+    next();
+  };