create docker release action

.github/workflows/docker.yml

@@ -0,0 +1,83 @@
+# Publishes the Docker image.
+
+name: docker
+
+on:
+  push:
+    tags:
+      - v*
+
+env:
+  IMAGE_NAME: ${{ github.repository_owner }}/nanoreth
+  CARGO_TERM_COLOR: always
+  DOCKER_IMAGE_NAME: ghcr.io/${{ github.repository_owner }}/nanoreth
+  DOCKER_USERNAME: ${{ github.actor }}
+
+jobs:
+  build-rc:
+    if: contains(github.ref, '-rc')
+    name: build and push as release candidate
+    runs-on: ubuntu-24.04
+    permissions:
+      packages: write
+      contents: read
+    strategy:
+      fail-fast: false
+      matrix:
+        build:
+          - name: "Build and push nanoreth image"
+            command: "make IMAGE_NAME=$IMAGE_NAME DOCKER_IMAGE_NAME=$DOCKER_IMAGE_NAME PROFILE=maxperf docker-build-push"
+    steps:
+      - uses: actions/checkout@v5
+      - uses: rui314/setup-mold@v1
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+        with:
+          cache-on-failure: true
+      - name: Install cross main
+        id: cross_main
+        run: |
+          cargo install cross --git https://github.com/cross-rs/cross
+      - name: Log in to Docker
+        run: |
+          echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io --username ${DOCKER_USERNAME} --password-stdin
+      - name: Set up Docker builder
+        run: |
+          docker run --privileged --rm tonistiigi/binfmt --install arm64,amd64
+          docker buildx create --use --name cross-builder
+      - name: Build and push ${{ matrix.build.name }}
+        run: ${{ matrix.build.command }}
+
+  build:
+    if: ${{ !contains(github.ref, '-rc') }}
+    name: build and push as latest
+    runs-on: ubuntu-24.04
+    permissions:
+      packages: write
+      contents: read
+    strategy:
+      fail-fast: false
+      matrix:
+        build:
+          - name: "Build and push nanoreth image"
+            command: "make IMAGE_NAME=$IMAGE_NAME DOCKER_IMAGE_NAME=$DOCKER_IMAGE_NAME PROFILE=maxperf docker-build-push-latest"
+    steps:
+      - uses: actions/checkout@v5
+      - uses: rui314/setup-mold@v1
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+        with:
+          cache-on-failure: true
+      - name: Install cross main
+        id: cross_main
+        run: |
+          cargo install cross --git https://github.com/cross-rs/cross
+      - name: Log in to Docker
+        run: |
+          echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io --username ${DOCKER_USERNAME} --password-stdin
+      - name: Set up Docker builder
+        run: |
+          docker run --privileged --rm tonistiigi/binfmt --install arm64,amd64
+          docker buildx create --use --name cross-builder
+      - name: Build and push ${{ matrix.build.name }}
+        run: ${{ matrix.build.command }}