feat: add release workflow

.github/workflows/release.yml

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+#
+# Releaser workflow setup
+# https://goreleaser.com/ci/actions/
+#
+name: release
+
+# run only on tags
+on:
+  push:
+    tags:
+      - 'v*'
+
+permissions:
+  contents: write # needed to write releases
+  id-token: write # needed for keyless signing
+  packages: write # needed for ghcr access
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # this is important, otherwise it won't checkout the full tree (i.e. no previous tags)
+      - uses: actions/setup-go@v5
+        with:
+          go-version: 1.23
+          cache: true
+      - uses: sigstore/cosign-installer@v3.6.0         # installs cosign
+      - uses: anchore/sbom-action/download-syft@v0.17.2 # installs syft
+      - uses: docker/login-action@v3                   # login to ghcr
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - uses: goreleaser/goreleaser-action@v6          # run goreleaser
+        with:
+          version: latest
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.goreleaser.yml

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+# .goreleaser.yml
+project_name: CBZOptimizer
+release:
+  github:
+    owner: belphemur
+    name: CBZOptimizer
+    changelog:
+      sort: asc
+      filters:
+        exclude:
+          - '^docs:'
+          - '^test:'
+          - '^chore:'
+builds:
+  - id: cbzoptimizer
+    main: main.go
+    goos:
+      - linux
+    goarch:
+      - amd64
+      - arm64
+    # ensures mod timestamp to be the commit timestamp
+    mod_timestamp: "{{ .CommitTimestamp }}"
+    flags:
+      # trims path
+      - -trimpath
+    ldflags:
+      - -s -w -X meta.Version={{.Version}} -X meta.Commit={{.Commit}} -X meta.Date={{ .CommitDate }}
+    env:
+      - CGO_ENABLED=0
+# config the checksum filename
+# https://goreleaser.com/customization/checksum
+checksum:
+  name_template: "checksums.txt"
+# create a source tarball
+# https://goreleaser.com/customization/source/
+source:
+  enabled: true
+# proxies from the go mod proxy before building
+# https://goreleaser.com/customization/gomod
+gomod:
+  proxy: true
+# creates SBOMs of all archives and the source tarball using syft
+# https://goreleaser.com/customization/sbom
+sboms:
+  - artifacts: archive
+  - id: source # Two different sbom configurations need two different IDs
+    artifacts: source
+# create a docker image
+# https://goreleaser.com/customization/docker
+dockers:
+  - image_templates:
+      - "ghcr.io/belphemur/cbzoptimizer:latest"
+      - "ghcr.io/belphemur/cbzoptimizer:{{ .Version }}"
+    dockerfile: Dockerfile
+    build_flag_templates:
+      - "--pull"
+      - "--label=org.opencontainers.image.created={{.Date}}"
+      - "--label=org.opencontainers.image.name={{.ProjectName}}"
+      - "--label=org.opencontainers.image.revision={{.FullCommit}}"
+      - "--label=org.opencontainers.image.version={{.Version}}"
+      - "--label=org.opencontainers.image.source={{.GitURL}}"
+# signs the checksum file
+# all files (including the sboms) are included in the checksum, so we don't need to sign each one if we don't want to
+# https://goreleaser.com/customization/sign
+signs:
+  - cmd: cosign
+    env:
+      - COSIGN_EXPERIMENTAL=1
+    certificate: "${artifact}.pem"
+    args:
+      - sign-blob
+      - "--output-certificate=${certificate}"
+      - "--output-signature=${signature}"
+      - "${artifact}"
+      - "--yes" # needed on cosign 2.0.0+
+    artifacts: checksum
+    output: true
+# signs our docker image
+# https://goreleaser.com/customization/docker_sign
+docker_signs:
+  - cmd: cosign
+    env:
+      - COSIGN_EXPERIMENTAL=1
+    artifacts: images
+    output: true
+    args:
+      - "sign"
+      - "${artifact}"
+      - "--yes" # needed on cosign 2.0.0+
+archives:
+  - format: tar.gz
+    name_template: "{{ .ProjectName }}_{{ .Version }}_{{ .Os }}_{{ .Arch }}"
+    files:
+      - LICENSE
+      - README.md
+      - CHANGELOG.md
+      - "CBZOptimizer"

Dockerfile

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+FROM alpine:latest
+LABEL authors="Belphemur"
+ENV USER=abc
+ENV CONFIG_FOLDER=/config
+ENV PUID=99
+ENV PGID=100
+RUN mkdir -p "${CONFIG_FOLDER}" && addgroup -g "${PGID}" "${USER}" && adduser \
+    --disabled-password \
+    --gecos "" \
+    --home "$(pwd)" \
+    --ingroup "${USER}" \
+    --no-create-home \
+    --uid "${PUID}" \
+    "${USER}" && \
+    chown ${PUID}:${GUID} /config "${CONFIG_FOLDER}"
+
+COPY CBZOptimizer /usr/local/bin/CBZOptimizer
+
+RUN apk add --no-cache inotify-tools && chmod +x /usr/local/bin/CBZOptimizer
+
+USER ${USER}
+ENTRYPOINT ["/usr/local/bin/CBZOptimizer"]