Add Create A Local Sanity Dataset Backup as a Workflow TIL

workflow/create-a-local-sanity-dataset-backup.md

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+# Create A Local Sanity Dataset Backup
+
+Let's say you've put together a script that is going to mutate some data in
+your production dataset on Sanity. Before you run that script, it would be
+prudent to capture a backup in case something goes wrong. That way you can
+always restore to how the data was in the event that you need to.
+
+You can do this from the command line with the `sanity` CLI.
+
+First, ensure you are signed in via the CLI.
+
+```bash
+$ sanity login
+```
+
+Then, you can issue the `dataset export` command, naming the dataset (in this
+case, `production`) to target and the name of the backup file to be created
+locally.
+
+```bash
+$ sanity dataset export production my-project-backup.tar.gz
+```
+
+I believe the Sanity CLI goes off the `sanity.cli.{ts,js}` file in your local
+project directory to determine what Sanity project it should be working with.
+
+See the [`export dataset`](https://www.sanity.io/docs/dataset#fd38ca03b011)
+docs for more details.