Initial commit: Meshkee CMS API

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

database/migrations/018_product_variant_reward_points.sql

@@ -0,0 +1,7 @@
+-- Reward points earned when purchasing a store item variant (festival rewards — usage later)
+ALTER TABLE product_variants
+  ADD COLUMN reward_points INTEGER;
+
+ALTER TABLE product_variants
+  ADD CONSTRAINT product_variants_reward_points_non_negative
+  CHECK (reward_points IS NULL OR reward_points >= 0);