feat: turbostarter boilerplate

Production-ready Next.js boilerplate with:
- Runtime env validation (fail-fast on missing vars)
- Feature-gated config (S3, Stripe, email, OAuth)
- Docker + Coolify deployment pipeline
- PostgreSQL + pgvector, MinIO S3, Better Auth
- TypeScript strict mode (no ignoreBuildErrors)
- i18n (en/es), AI modules, billing, monitoring

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/db/src/server.ts

@@ -0,0 +1,8 @@
+import { drizzle } from "drizzle-orm/postgres-js";
+import postgres from "postgres";
+
+import { env } from "./env";
+import { schema } from "./schema";
+
+const client = postgres(env.DATABASE_URL ?? "");
+export const db = drizzle({ client, schema, casing: "snake_case" });