feat: add GHCR support for container registry (#48)

* feat: add GHCR support for container registry

Signed-off-by: Gabor Boros <gabor@opencraft.com>

* refactor: remove image tag output

Signed-off-by: Gabor Boros <gabor@opencraft.com>

* docs: add registry documentation

Signed-off-by: Gabor Boros <gabor@opencraft.com>

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Signed-off-by: Gabor Boros <gabor@opencraft.com>

feat: support multiple SSH private keys in reusable workflow (#54)

Merge pull request #44 from eduNEXT/lfc/test-branch

chore: update tutor-contrib-picasso tag

refactor: conditionally pass ssh key for strain checkout when needed (#…

…42)

refactor: conditionally pass ssh key for strain checkout when needed (#…

…42)

feat!: allow specifying the parallelism limit for buildkit (#41)

feat!: allow specifying the parallelism limit for buildkit (#41)

fix: use working directory when running scan logs script (#36)

refactor: pin system requirements to favor controlled updates (#30)

fix: use working directory when running scan logs script (#36)