added instructions for database backup/restore to README

README.md

@@ -14,9 +14,16 @@ We are using Docker and Docker Compose in order to make it as easy as possible f
 4. Open the Docker CLI and navigate to the location of the demo files.
 5. Start demo by running `docker-compose up -d`
 
+## Backup / Restore Database
+
+We provide a simple shell script to backup and restore the current state of the MongoDB database:
+
+- Backup: `./sample-data.sh dump backup_2018_08_30.mongoarchive`
+- Restore: `./sample-data.sh restore backup_2018_08_30.mongoarchive`
+
 ## Copyright
 
-2017, Institute for Automation of Complex Power Systems, EONERC
+2017-2018, Institute for Automation of Complex Power Systems, EONERC
 
 ## License