feat(ci): add ci workflow file

Release-As: 0.1.0

.github/workflows/ci.yml

@@ -0,0 +1,96 @@
+name: CI
+on:
+    push:
+
+jobs:
+    test:
+        name: Test
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+            - name: Setup Go
+              uses: actions/setup-go@v5
+              with:
+                  go-version: 1.23
+            - name: Test
+              run: go run gotest.tools/gotestsum@latest --junitfile unit-tests.xml --format pkgname
+
+    release-please:
+        name: Release
+        runs-on: ubuntu-latest
+        needs: [test]
+        if: github.ref == 'refs/heads/main'
+        outputs:
+            release_created: ${{ steps.release-please.outputs.release_created }}
+        steps:
+            - uses: googleapis/release-please-action@v4
+              id: release-please
+              with:
+                  token: ${{ secrets.GITHUB_TOKEN }}
+                  release-type: go
+
+    build-image:
+        name: Publish
+        if: github.ref_type == 'tag'
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v5
+
+            # Install the cosign tool except on PR
+            # https://github.com/sigstore/cosign-installer
+            - name: Install cosign
+              uses: sigstore/cosign-installer@v3.3.0
+              with:
+                  cosign-release: "v2.2.2"
+
+            # Set up BuildKit Docker container builder to be able to build
+            # multi-platform images and export cache
+            # https://github.com/docker/setup-buildx-action
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v3
+
+            # Login against a Docker registry except on PR
+            # https://github.com/docker/login-action
+            - name: Log into registry ${{ env.REGISTRY }}
+              uses: docker/login-action@v3
+              with:
+                  registry: ${{ env.REGISTRY }}
+                  username: ${{ github.actor }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+
+            # Extract metadata (tags, labels) for Docker
+            # https://github.com/docker/metadata-action
+            - name: Extract Docker metadata
+              id: meta
+              uses: docker/metadata-action@v5
+              with:
+                  images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+            # Build and push Docker image with Buildx (don't push on PR)
+            # https://github.com/docker/build-push-action
+            - name: Build and push Docker image
+              id: build-and-push
+              uses: docker/build-push-action@v5
+              with:
+                  context: .
+                  push: ${{ github.event_name != 'pull_request' }}
+                  tags: ghcr.io/scottmckendry/mnemstart:${{ github.event.release.tag_name }}
+                  labels: ${{ steps.meta.outputs.labels }}
+                  cache-from: type=gha
+                  cache-to: type=gha,mode=max
+
+            # Sign the resulting Docker image digest except on PRs.
+            # This will only write to the public Rekor transparency log when the Docker
+            # repository is public to avoid leaking data.  If you would like to publish
+            # transparency data even for private images, pass --force to cosign below.
+            # https://github.com/sigstore/cosign
+            - name: Sign the published Docker image
+              env:
+                  # https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
+                  TAGS: ghcr.io/scottmckendry/mnemstart:${{ github.event.release.tag_name }}
+                  DIGEST: ${{ steps.build-and-push.outputs.digest }}
+              # This step uses the identity token to provision an ephemeral certificate
+              # against the sigstore community Fulcio instance.
+              run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}