add information about using the backup

README.md

@@ -6,4 +6,19 @@ Service for indexing Ekubo events into a Postgres database.
 
 The indexer focuses on producing an always-consistent realtime view of Ekubo events, using the Apibara service to get a stream of relevant data.
 
-Events are not transformed by the indexer, simply cataloged for later use such as in materialized views or complex analytical queries.
+Events are not transformed by the indexer, simply cataloged for later use such as in materialized views or complex analytical queries.
+
+## Syncing a new node
+
+It can take weeks to sync a new mainnet node, so it's recommended to start by using
+the [`pg_restore`](https://www.postgresql.org/docs/current/app-pgrestore.html) utility with
+the [latest backup](https://github.com/EkuboProtocol/indexer/actions/workflows/backup.yml) of our production database.
+
+The backup is in the directory format, and can be imported more quickly in parallel using the `--jobs` parameter
+of `pg_restore`. To utilize the backup:
+
+- Download the `Backup.zip` artifact from the latest workflow run
+- Extract the directory
+- `pg_restore --dbname=mainnet ~/Downloads/Backup --jobs=16`
+
+After restoring from the backup, you can start the indexer and it should begin at the last block that was synced before the backup started.