use mixer_sif namespace for oras push

.github/workflows/container_build_push.yml

@@ -79,11 +79,10 @@ jobs:
           IFS= read -r first_tag <<EOF
           $tags
           EOF
-          echo "The first tag is: $first_tag"
-          echo "CSV-tags are: $csv_tags"
+          push_tags="$(printf $csv_tags | sed -e "s/mixer/mixer_sif/g")"
           echo ${{ secrets.GITHUB_TOKEN }} | oras login --username ${{ github.repository_owner }} --password-stdin ghcr.io
           docker pull kaczmarj/apptainer:latest
           docker run --rm --privileged -v $(pwd):/work kaczmarj/apptainer build mixer.sif docker://"$first_tag"
-          oras push "$csv_tags" --artifact-type application/vnd.acme.rocket.config mixer.sif
+          oras push "$push_tags" mixer.sif
           rm mixer.sif
         shell: sh

README.md

@@ -45,14 +45,14 @@ cd path/to/repositories/mixer/singularity
 mv mixer.sif mixer.sif.old  # optional, just rename the old(er) file
 apptainer pull docker://ghcr.io/comorment/mixer:<tag>  # or
 singularity pull docker://ghcr.io/comorment/mixer:<tag> # or 
-oras pull ghcr.io/comorment/mixer:<tag>
+oras pull ghcr.io/comorment/mixer_sif:<tag>
 ```
 
 where `<tag>` corresponds to a tag listed under [packages](https://github.com/comorment/mixer/pkgs/container/mixer), 
 such as `latest`, `main`, or `sha_<GIT SHA>`. 
 The `oras pull` statement
 
-To pull the corresponding Docker image, issue
+To pull the corresponding Docker image, issue:
 
 ```bash
 docker pull ghcr.io/comorment/mixer:<tag>