feat: add ghcr.io push

.github/workflows/ghcr_build_push.yml

@@ -0,0 +1,69 @@
+name: Build and Publish Docker Images to ghcr.io
+
+on:
+  push:
+    branches:
+      - "feat/s2n-quic"
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build_and_push:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - target: "default"
+            dockerfile: ./docker/Dockerfile
+            platforms: linux/amd64
+
+          - target: "s2n"
+            dockerfile: ./docker/Dockerfile
+            build-args: |
+              "CARGO_FEATURES=--no-default-features --features http3-s2n"
+              "ADDITIONAL_DEPS=pkg-config libssl-dev cmake libclang1 gcc g++"
+            platforms: linux/amd64
+            tags-suffix: "-s2n"
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # 今Pushし放題なので注意
+      - name: Nightly build and push
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          build-args: ${{ matrix.build-args }}
+          push: true
+          tags: |
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:nightly${{ matrix.tags-suffix }}
+          file: ${{ matrix.dockerfile }}
+          cache-from: type=gha,scope=rpxy-${{ matrix.target }}
+          cache-to: type=gha,mode=max,scope=rpxy-${{ matrix.target }}
+          platforms: ${{ matrix.platforms }}
+          labels: ${{ steps.meta.outputs.labels }}