fix readme

README.md

@@ -15,16 +15,18 @@ yarn install
 ### Importing data to firestore
 To achieve this goal we use [node-firestore-import-export library](https://www.npmjs.com/package/node-firestore-import-export).
 1. Create `docker-compose.override.yml` and add this content to it
+
     ```
     version: '3'
 
     services: 
       app:
         volumes:
-      - ~/path/to/firebase/credentials.json:/var/www/credentials.json
+          - /path/to/firebase/credentials.json:/var/www/credentials.json
         environment: 
           - GOOGLE_APPLICATION_CREDENTIALS=/var/www/cred.json
     ```
+
 1. Run `docker-compose exec app firestore-import --yes --backupFile /var/www/vue/data/back-up.json`
 
 ### Compiles and hot-reloads for development