add server to monorepo.

packages/server/src/services/Tenancy/SystemService.ts

@@ -0,0 +1,25 @@
+import Container from 'typedi';
+import { Service } from 'typedi';
+
+@Service()
+export default class HasSystemService implements SystemService {
+  private container(key: string) {
+    return Container.get(key);
+  }
+
+  knex() {
+    return this.container('knex');
+  }
+
+  repositories() {
+    return this.container('repositories');
+  }
+
+  cache() {
+    return this.container('cache');
+  }
+
+  dbManager() {
+    return this.container('dbManager');
+  }
+}