feat(init): add initial project scaffolding and database schema

- Add Dockerfile for multi-stage production build
- Add Drizzle configuration and initial migration for PostgreSQL schema
- Add project configuration files (.prettierrc, .prettierignore, .dockerignore)
- Define core database tables: assets, memberships, site_settings

src/lib/server/db/index.ts

@@ -0,0 +1,7 @@
+import { drizzle } from 'drizzle-orm/postgres-js';
+import postgres from 'postgres';
+import { env } from '$env/dynamic/private';
+
+const client = postgres(env.DATABASE_URL);
+
+export const db = drizzle(client);