feat: add publish-dvm-image CI workflow

.github/workflows/publish-dvm-image.yml

@@ -0,0 +1,125 @@
+# Publish DVM Image to GHCR
+#
+# Trigger scenarios:
+#   - Push of tag v*        → build + push versioned tag + :latest, sign digest.
+#   - workflow_dispatch     → build + push versioned tag only (NO :latest move), for rehearsals.
+#
+# Single-platform: linux/amd64 only. arm64 deferred — QEMU crashes on the
+# Solana/Rust dependency chain ("Illegal instruction"). Native arm64 runners
+# can be added later via per-arch matrix + imagetools create manifest-merge.
+#
+# Prerequisite: Dockerfile.dvm must build standalone from this repo's context
+# (issue #2 — trim to dvm-only). Until #2 is merged the build step will fail
+# because the Dockerfile still references monorepo paths (packages/*, docker/).
+#
+# Cosign verify (post-publish runbook):
+#   digest=$(docker buildx imagetools inspect ghcr.io/toon-protocol/store:latest \
+#     --format '{{.Manifest.Digest}}')
+#   cosign verify ghcr.io/toon-protocol/store@$digest \
+#     --certificate-identity-regexp '^https://github.com/toon-protocol/store/' \
+#     --certificate-oidc-issuer 'https://token.actions.githubusercontent.com'
+
+name: Publish DVM Image
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version tag for image (e.g. 0.1.0-rc1). Required for workflow_dispatch.'
+        required: true
+        type: string
+
+concurrency:
+  group: '${{ github.workflow }}-${{ github.ref }}'
+  cancel-in-progress: false
+
+permissions:
+  contents: read
+  packages: write
+  id-token: write  # required for cosign keyless OIDC token
+
+env:
+  IMAGE: ghcr.io/toon-protocol/store
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    timeout-minutes: 90
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f  # v3
+
+      - name: Log in to GHCR
+        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9  # v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract image metadata (tags)
+        id: meta
+        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051  # v5
+        with:
+          images: ${{ env.IMAGE }}
+          tags: |
+            type=raw,value=latest,enable=${{ github.ref_type == 'tag' && startsWith(github.ref, 'refs/tags/v') }}
+            type=match,pattern=v(.*),group=1
+            type=raw,value=${{ inputs.version }},enable=${{ inputs.version != '' }}
+            type=sha,prefix=sha-
+
+      # Pass 1: build only — load into local daemon for smoke test (no push yet)
+      - name: Build (no push)
+        id: build-local
+        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8  # v6
+        with:
+          context: .
+          file: Dockerfile.dvm
+          platforms: linux/amd64
+          load: true
+          tags: smoke-test-local:latest
+          cache-from: type=gha,scope=store-linux-amd64
+          cache-to: type=gha,mode=max,scope=store-linux-amd64
+
+      - name: Smoke-test DVM image (pre-push)
+        run: |
+          set -euo pipefail
+          IMG="smoke-test-local:latest"
+          docker run --rm --entrypoint sh "${IMG}" -c \
+            "test -s '/app/entrypoint-dvm.js'" \
+            || { echo "FAIL: /app/entrypoint-dvm.js missing or empty"; exit 1; }
+          NODE_VERSION=$(docker run --rm --entrypoint node "${IMG}" --version)
+          case "${NODE_VERSION}" in
+            v20.*) ;;
+            *) echo "FAIL: expected node v20.x, got ${NODE_VERSION}"; exit 1 ;;
+          esac
+          echo "/app/entrypoint-dvm.js present + ${NODE_VERSION}"
+
+      # Pass 2: push only — BuildKit GHA cache makes this near-instant (no rebuild)
+      - name: Push
+        id: build
+        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8  # v6
+        with:
+          context: .
+          file: Dockerfile.dvm
+          platforms: linux/amd64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha,scope=store-linux-amd64
+
+      - name: Install cosign
+        uses: sigstore/cosign-installer@398d4b0eeef1380460a10c8013a76f728fb906ac  # v3.9.1
+
+      - name: Sign image digest
+        env:
+          COSIGN_YES: 'true'
+          DIGEST: ${{ steps.build.outputs.digest }}
+        run: |
+          cosign sign "${IMAGE}@${DIGEST}"