Merge pull request #16 from jkaninda/develop

Update docker compose example files

example/docker-compose.yaml

@@ -7,6 +7,8 @@ services:
       - /bin/sh
       - -c
       - bkup --operation backup --dbname database_name
+    volumes:
+      - ./backup:/backup
     environment:
       - DB_PORT=5432
       - DB_HOST=postgress