chore: create script for migrating data from staging to production

Closes #187

scripts/staging-to-production.js

@@ -0,0 +1,17 @@
+import { Firestore } from '@google-cloud/firestore';
+
+// update production firestore database from staging database
+
+const staging = new Firestore();
+
+const production = new Firestore({
+  projectId: '<project-id>',
+});
+
+const stagingAccounts = await staging.collection('accounts').get();
+
+for (const doc of stagingAccounts.docs) {
+  const data = doc.data();
+  console.log(`Seeding staging account ${doc.id}`);
+  await production.collection('accounts').doc(doc.id).set(data);
+}