feat: tagged docker build

.github/workflows/tagged.yml

@@ -0,0 +1,37 @@
+name: Docker build on tag
+env:
+  DOCKER_CLI_EXPERIMENTAL: enabled
+  TAG_FMT: "^refs/tags/(((.?[0-9]+){3,4}))$"
+on:
+  push:
+    tags:
+      - v[0-9]+.[0-9]+.[0-9]+
+      - v[0-9]+.[0-9]+.[0-9]+-*
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set env variables
+        run: echo "TAG=${GITHUB_REF/refs\/tags\//}" >> $GITHUB_ENV
+      - uses: actions/checkout@v2
+      - uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
+      - uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - uses: docker/setup-qemu-action@v1
+      - uses: docker/setup-buildx-action@v1
+      - name: Build the Docker image
+        run: |
+          docker buildx build \
+            -t ghcr.io/${{ github.repository_owner }}/snort:$TAG \
+            --cache-from "type=local,src=/tmp/.buildx-cache" \
+            --cache-to "type=local,dest=/tmp/.buildx-cache" \
+            --platform linux/amd64,linux/arm64 \
+            --push .