set correct image name

Readme.md

@@ -47,7 +47,7 @@ docker run --rm \
   -e ENCRYPTION_PASSWORD="your-encryption-password" \
   -e TARGET_FOLDER="local" \
   -v /path/to/local/backups:/backups \
-  postgres-backup
+  jonasled.dev/infra/images/postgres-backup:latest
 ```
 
 ### Running the Container with S3 Backup
@@ -67,4 +67,4 @@ docker run --rm \
   -e S3_PATH="backups/postgres" \
   -e S3_REGION="us-west-2" \
   -e S3_USE_PATH_STYLE="true" \
-  postgres-backup
+  jonasled.dev/infra/images/postgres-backup:latest