feat: Payment system with voucher cards.

feat: Design with inversion dependency injection architecture.
feat: Prettier http middleware.
feat: Re-write items categories with preferred accounts.

server/src/system/seeds/seed_subscriptions_plans.js

@@ -0,0 +1,26 @@
+
+exports.seed = (knex) => {
+  // Deletes ALL existing entries
+  return knex('subscription_plans').del()
+    .then(() => {
+      // Inserts seed entries
+      return knex('subscription_plans').insert([
+        {
+          id: 1,
+          name: 'free',
+          slug: 'free',
+          price: 0,
+          active: true,
+          currency: 'LYD',
+
+          trial_period: 15,
+          trial_interval: 'days',
+
+          invoice_period: 3,
+          invoice_interval: 'month',
+
+          index: 1,
+        }
+      ]);
+    });
+};