chore: add backup and restore guide

Author: blockchainluffy

README.md

@@ -36,6 +36,10 @@ The setup wizard provides options for users to configure the package. These valu
    - `PUSHGATEWAY_USERNAME`: A username for the push gateway from above.
    - `PUSHGATEWAY_PASSWORD`: A password for the push gateway from above.
 
+### Backup and Restore
+
+For information on backing up and restoring your Shutter API package data, see the [Backup and Restore Guide](backup_restore.md).
+
 ### Developer notes
 
 Building the package requires docker and a vpn connection to a dappnode. It can be run with:

backup_and_restore.md

@@ -0,0 +1,65 @@
+# Backup and Restore Guide
+
+This guide explains how to backup and restore your Shutter API DAppNode package data.
+
+## Backup Creation
+
+DAppNode provides a built-in backup functionality through the DAppNode UI. Users can create backup archives directly from the interface, which generates a compressed tar file that should be downloaded for safekeeping.
+
+### What Gets Backed Up
+
+The package automatically backs up the following critical data:
+
+- **Keyper Configuration** (`/keyper/config`): Contains your Shutter Keyper settings and configuration files
+- **Chain Configuration** (`/chain/config`): Contains your Shutter Chain node configuration
+- **Database Data** (`/var/lib/postgresql/data`): Contains the PostgreSQL database with your Keyper's state
+- **Metrics Configuration** (`/config/user`): Contains your metrics service configuration
+
+### Creating a Backup
+
+1. Navigate to your DAppNode UI
+2. Go to the Shutter API package
+3. Click on the "Backup" option
+4. Wait for the backup process to complete
+5. Download the generated backup file to a secure location
+
+## Restore Process
+
+The restore process requires a two-step approach:
+
+### Step 1: Package Installation
+The DAppNode package must be installed first through the DAppNode UI. This creates a fresh installation with default configuration.
+
+### Step 2: Backup Restoration
+Once installation is complete, the previously downloaded backup file can be restored to the newly installed package. This will restore all your previous data.
+
+## Environment Variables
+
+After restoration, the environment variables in the restored deployment will match those configured during the package installation of restore process. This includes:
+
+- `KEYPER_NAME`: Your unique keyper identifier
+- `SHUTTER_API_NODE_PRIVATEKEY`: Your Ethereum private key
+- `ETHEREUM_WS`: Your Ethereum WebSocket RPC endpoint
+- `SHUTTER_PUSH_METRICS_ENABLED`: Metrics push configuration
+- `PUSHGATEWAY_URL`: Metrics push gateway URL
+- `PUSHGATEWAY_USERNAME`: Push gateway authentication
+- `PUSHGATEWAY_PASSWORD`: Push gateway authentication
+
+## Security Considerations
+
+⚠️ **Important Security Notes:**
+
+- The backup archive contains previous configuration files that will include sensitive data
+- Your private keys and configuration are stored in the backup
+- Store backup files in a secure, encrypted location
+- Never share backup files with untrusted parties
+
+## Troubleshooting
+
+If you encounter issues during backup or restore:
+
+1. Ensure you have sufficient disk space for backup creation
+2. Verify that all services are running before creating a backup
+3. Check that the backup file was downloaded completely
+4. Ensure the package is fully installed before attempting restore
+5. Contact DAppNode support if restore fails