chore: update readme to work with github container registry

readme.md

@@ -26,16 +26,16 @@ The `master` branch is empty, try any other branch to see different versions.
 
 - Build the container image (from project base directory)
 
-  `docker build --no-cache -t neverbot/maldorne-mudos:v21.7 -f Dockerfile .`
+  `docker build --no-cache . -t ghcr.io/maldorne/mudos:v21.7`
 
 - Run the container and take a look inside using a terminal
 
-  `docker run --rm -ti neverbot/maldorne-mudos:v21.7 /bin/bash`
+  `docker run --rm -ti ghcr.io/maldorne/mudos:v21.7 /bin/bash`
 
   Inside the container, in `/opt/mud`, you can find the directories `driver` 
   (with the source code of MudOS) and `bin`, with the two binaries needed
   to use MudOS (`addr_server` and `driver`).
 
 - Publish the container in Docker Hub
 
-  `docker push neverbot/maldorne-mudos:v21.7`
+  `docker push ghcr.io/maldorne/mudos:v21.7`