chore: switch to ghcr from dockerhub

Author: michaellzc

README.md

@@ -2,5 +2,4 @@
 
 Automated backups for MySQL, Mongo, and file paths using the Backwork library.
 
-[View backwork on dockerhub](https://hub.docker.com/r/snportals/backwork)
-
+[View backwork on GitHub container registry](https://github.com/IBM/backwork-docker/pkgs/container/backwork)

docker-compose.yaml

@@ -7,7 +7,7 @@ services:
   backwork:
     build:
       context: ./backwork
-    image: bigdatauniversity/backwork:1.6.3
+    image: ghcr.io/ibm/backwork:1.6.3
     environment:
       - MYSQL_HOST=mysql
       - MYSQL_PORT=3306