Add GitHub CI

Author: petertodd

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

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+name: Docker CI
+on:
+  push:
+    tags:
+      - 'libre-relay-v29.0*'
+
+jobs:
+  build:
+    name: Build and push to GitHub Container Registry
+    runs-on: ubuntu-22.04
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Set VERSION
+        run: echo "VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+
+      - uses: actions/checkout@v4
+
+      - name: Login to GitHub Container Registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u "${{ github.actor }}" --password-stdin
+
+      - name: Setup Docker buildx
+        run: docker buildx create --use
+
+      - name: Run Docker buildx
+        run: |
+          docker buildx build \
+            --platform linux/amd64,linux/arm64 \
+            --build-arg VERSION=${{ env.VERSION }} \
+            --tag ghcr.io/${{ github.repository }}:${{ env.VERSION }} \
+            --push .
+
+      - name: Rebuild for latest tag
+        run: |
+          docker buildx build \
+            --platform linux/amd64,linux/arm64 \
+            --build-arg VERSION=${{ env.VERSION }} \
+            --tag ghcr.io/${{ github.repository }}:latest \
+            --push .

Dockerfile

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+# Build stage
+FROM debian:bookworm-slim AS builder
+
+# Install build dependencies
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    cmake \
+    libboost-all-dev \
+    libevent-dev \
+    libtool \
+    pkg-config \
+    libzmq3-dev \
+    libsqlite3-dev \
+    # python3 - only needed if running test suite
+    # optional for UPnP support:
+    # libminiupnpc-dev \
+    # optional for NAT-PMP support:
+    # libnatpmp-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy local bitcoin source
+WORKDIR /build
+COPY . .
+
+# Build Bitcoin Core
+RUN cmake -B build \
+  -DCMAKE_INSTALL_PREFIX=/build \
+  -DCMAKE_RUNTIME_OUTPUT_DIRECTORY=/build/bin \
+  -DINSTALL_MAN=OFF \
+  -DBUILD_SHARED_LIBS=OFF \
+  -DWITH_CCACHE=OFF \
+  -DBUILD_TESTS=OFF \
+  -DREDUCE_EXPORTS=ON \
+  -DBUILD_UTIL=ON \
+  -DBUILD_WALLET_TOOL=ON \
+  -DWITH_ZMQ=ON
+RUN cmake --build build
+
+# Final stage
+FROM debian:bookworm-slim
+
+# Install runtime dependencies
+RUN apt-get update && apt-get install -y \
+    libevent-2.1-7 \
+    libevent-extra-2.1-7 \
+    libevent-pthreads-2.1-7 \
+    libzmq5 \
+    libsqlite3-0 \
+    libdb5.3++ \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /build/bin/bitcoind /bin
+COPY --from=builder /build/bin/bitcoin-cli /bin
+
+ENV HOME=/data
+VOLUME /data/.bitcoin
+
+EXPOSE 8332 8333 18332 18333 18443 18444
+
+ENTRYPOINT ["bitcoind"]