Initial commit: Meshkee CMS API

NestJS backend with Prisma, Docker Compose for Postgres/Redis, and deploy docs for the production VM.

database/migrations/023_orders_process_step.sql

@@ -0,0 +1,7 @@
+-- Meshkee CMS — order fulfillment process step (from business store settings)
+
+ALTER TABLE orders
+  ADD COLUMN IF NOT EXISTS process_step_id VARCHAR(64) NOT NULL DEFAULT 'processing';
+
+CREATE INDEX IF NOT EXISTS idx_orders_business_process_step
+  ON orders (business_id, process_step_id);