chore: build docker image (#161)

Description
---

Build and publish docker image of sha-p2pool

.github/workflows/docker.yml

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+---
+name: Build docker images
+
+on:
+  push:
+    tags:
+      - "v[0-9]+.[0-9]+.[0-9]*"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Login to Quay.io
+        uses: docker/login-action@v3
+        with:
+          registry: quay.io
+          username: ${{ secrets.QUAY_USERNAME }}
+          password: ${{ secrets.QUAY_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: quay.io/tarilabs/sha-p2pool
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Setup docker context for buildx
+        id: buildx-context
+        run: docker context create builders
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          endpoint: builders
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          platforms: linux/amd64 #, linux/arm64

Dockerfile

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+FROM lukemathwalker/cargo-chef:latest-rust-1 AS chef
+WORKDIR /app
+
+LABEL org.opencontainers.image.source=https://github.com/tari-project/sha-p2pool
+LABEL org.opencontainers.image.licenses="BSD"
+
+# Install system dependencies
+RUN apt-get update && apt-get -y upgrade \
+        && apt-get install -y libclang-dev pkg-config cmake protobuf-compiler \
+        libudev-dev
+
+# Builds a cargo-chef plan
+FROM chef AS planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM chef AS builder
+COPY --from=planner /app/recipe.json recipe.json
+
+# Build profile, release by default
+ARG BUILD_PROFILE=release
+ENV BUILD_PROFILE=$BUILD_PROFILE
+
+# Extra Cargo flags
+ARG RUSTFLAGS=""
+ENV RUSTFLAGS="$RUSTFLAGS"
+
+# Extra Cargo features
+ARG FEATURES=""
+ENV FEATURES=$FEATURES
+
+# Builds dependencies
+RUN cargo chef cook --profile $BUILD_PROFILE --features "$FEATURES" --recipe-path recipe.json
+
+# Build application
+COPY . .
+RUN cargo build --profile $BUILD_PROFILE --features "$FEATURES" --locked --bin sha_p2pool
+
+# ARG is not resolved in COPY so we have to hack around it by copying the
+# binary to a temporary location
+RUN cp /app/target/$BUILD_PROFILE/sha_p2pool /app/
+
+# Use Ubuntu as the release image
+FROM ubuntu:noble AS runtime
+
+RUN apt-get update && apt-get install -y tini curl && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Copy tari over from the build stage
+COPY --from=builder /app/sha_p2pool /usr/local/bin
+
+# Copy licenses
+COPY LICENSE-* ./
+
+ENTRYPOINT ["tini", "--", "/usr/local/bin/sha_p2pool"]