Singularity
Singularity is a nice and light-weight container format/runtime for HPC that you should definitely use. There is a single binary to build (with root permissions) and run (no root needed) your containers. More information: https://singularity.hpcng.org/ and https://sylabs.io/singularity/
Hinkskalle supports singularity with the library protocol as well as oras.
Library
Configure Hinkskalle as a known remote with a access token:
singularity remote add hinkskalle http://localhost:7660/
# paste token
singularity remote use hinkskalle
After that you can push/pull your images:
singularity push yourimage.sif library://muh.kuh/[collection]/[container]:[tag]
singularity pull library://muh.kuh/[collection]/[container]:[tag]
ORAS
export SINGULARITY_DOCKER_PASSWORD=[password]
export SINGULARITY_DOCKER_USERNAME=muh.kuh
singularity push yourimage.sif oras://localhost:7660/muh.kuh/[collection]/[container]:[tag]
docker/podman
Hinkskalle can handle your OCI containers as well. Just tag them to the server and push:
docker login -u muh.kuh localhost:7660
docker push localhost:7660/muh.kuh/[collection]/[container]:[tag]
docker pull localhost:7660/muh.kuh/[collection]/[container]:[tag]
ORAS
ORAS stands for OCI Registry As Storage and allows you to push arbitrary files/directories to a OCI registry. You need a command line client, see ORAS.
oras login --insecure -u muh.kuh localhost:7660
oras push --plain-http localhost:7660/muh.kuh/[collection]/[container]:[tag] \
file1 file2 ...
oras pull --plain-http localhost:7660/muh.kuh/[collection]/[container]:[tag]