refactor: flatten monorepo into standalone project

src/server/api/middlewares/db.middleware.ts

@@ -0,0 +1,11 @@
+import { os } from '@/server/api/server'
+import { getDB } from '@/server/db'
+
+export const db = os.middleware(async ({ context, next }) => {
+  return next({
+    context: {
+      ...context,
+      db: getDB(),
+    },
+  })
+})