Add Drizzle ORM with shared db package (#10)

packages/db/src/index.ts

@@ -0,0 +1,17 @@
+import { drizzle } from "drizzle-orm/postgres-js";
+import postgres from "postgres";
+import * as plannerSchema from "./schema/planner";
+import * as journalSchema from "./schema/journal";
+
+export function createDb(connectionString?: string) {
+  const client = postgres(
+    connectionString ?? process.env.DATABASE_URL ?? "postgres://trails:trails@localhost:5432/trails",
+  );
+  return drizzle(client, {
+    schema: { ...plannerSchema, ...journalSchema },
+  });
+}
+
+export type Database = ReturnType<typeof createDb>;
+
+export { plannerSchema, journalSchema };