build: Add Docker CI/CD

.github/workflows/docker.yaml

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+name: Docker CI
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: "0 0 * * 0"
+
+jobs:
+  build-linux:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    strategy:
+      matrix:
+        target:
+          - src: .
+            image: ghcr.io/pojntfx/weron
+            arch: "linux/amd64,linux/arm/v5,linux/arm/v7,linux/arm64/v8,linux/386,linux/mips64le,linux/ppc64le,linux/s390x"
+
+    steps:
+      - name: Maximize build space
+        run: |
+          sudo rm -rf /usr/share/dotnet
+          sudo rm -rf /usr/local/lib/android
+          sudo rm -rf /opt/ghc
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1 
+      - name: Login to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Set up metadata
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ matrix.target.image }}
+          tags: type=semver,pattern={{version}}
+      - name: Build image
+        uses: docker/build-push-action@v2
+        with:
+          context: ${{ matrix.target.src }}
+          file: ${{ matrix.target.src }}/Dockerfile
+          platforms: ${{ matrix.target.arch }}
+          push: false
+          tags: ${{ matrix.target.image }}:unstable
+          labels: ${{ steps.meta.outputs.labels }}
+      - name: Push pre-release image to Docker Hub
+        if: ${{ github.ref == 'refs/heads/main' }}
+        uses: docker/build-push-action@v2
+        with:
+          context: ${{ matrix.target.src }}
+          file: ${{ matrix.target.src }}/Dockerfile
+          platforms: ${{ matrix.target.arch }}
+          push: true
+          tags: ${{ matrix.target.image }}:unstable
+          labels: ${{ steps.meta.outputs.labels }}
+      - name: Push release image to Docker Hub
+        if: startsWith(github.ref, 'refs/tags/v')
+        uses: docker/build-push-action@v2
+        with:
+          context: ${{ matrix.target.src }}
+          file: ${{ matrix.target.src }}/Dockerfile
+          platforms: ${{ matrix.target.arch }}
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

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+# Build container
+FROM golang:bullseye AS build
+
+# Setup environment
+RUN mkdir -p /data
+WORKDIR /data
+
+# Build the release
+COPY . .
+RUN make
+
+# Extract the release
+RUN mkdir -p /out
+RUN cp out/weron /out/weron
+
+# Release container
+FROM debian:bullseye
+
+# Add certificates
+RUN apt update
+RUN apt install -y ca-certificates
+
+# Add the release
+COPY --from=build /out/weron /usr/local/bin/weron
+
+CMD /usr/local/bin/weron