Reduce debian image size by moving to slim variant

See merge request components/opentofu!151

Refs https://gitlab.com/components/opentofu/-/issues/44

chore(deps): update alpine/crane docker tag to v0.20.2

See merge request components/opentofu!150

Document commands to verify image signatures

See merge request components/opentofu!149

Sign images using cosign

See merge request components/opentofu!148

Support GitLab dependency proxy when building gitlab-tofu images

Closes #70

See merge request components/opentofu!147

Closes https://gitlab.com/components/opentofu/-/issues/70

Changelog: feature

Check for dependencies when running gitlab-tofu

See merge request components/opentofu!146

Changelog: feature

fix: add missing idn2 package to debian image

See merge request components/opentofu!145

chore(deps): update dependency opentofu/opentofu to v1.8.4

See merge request components/opentofu!144

chore(deps): update registry.gitlab.com/gitlab-org/release-cli docker tag to v0.19.0

See merge request components/opentofu!141

chore(deps): update dependency gitlab-org/cli to v1.48.0

See merge request components/opentofu!140

Improve documentation around module release

See merge request components/opentofu!139

Changelog: changed

Remove glab asset name hack

See merge request components/opentofu!138

chore(deps): update quay.io/containers/buildah docker tag to v1.37.3

See merge request components/opentofu!133

chore(deps): update dependency sigstore/cosign to v2.4.1

See merge request components/opentofu!137

chore(deps): update dependency opentofu/opentofu to v1.8.3

See merge request components/opentofu!136

Document auto-forwarding of CI/CD variables

See merge request components/opentofu!132

Refactor release script into separate file

See merge request components/opentofu!131