add server to monorepo.

packages/server/src/database/objection.ts

@@ -0,0 +1,8 @@
+import { Model } from 'objection';
+
+// Bind all Models to a knex instance. If you only have one database in
+// your server this is all you have to do. For multi database systems, see
+// the Model.bindKnex() method.
+export default ({ knex }) => {
+  Model.knex(knex);
+};