feat: add isGuest migration script

server/migrations/0001-add-isGuest.ts

@@ -0,0 +1,23 @@
+import connectDB, { User } from '@linux-odyssey/models'
+
+async function migrate() {
+  await connectDB(
+    process.env.MONGO_URL || 'mongodb://localhost:27017/odyssey-test'
+  )
+  await User.updateMany(
+    {
+      isGuest: { $exists: false },
+    },
+    { $set: { isGuest: false } }
+  )
+}
+
+migrate()
+  .then(() => {
+    console.log('Migration completed')
+    process.exit(0)
+  })
+  .catch((err) => {
+    console.error(err)
+    process.exit(1)
+  })