chore: add Dockerfile and docker-build workflow

.github/workflows/docker.yml

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+name: Docker
+
+on:
+  workflow_dispatch:
+  push:
+    branches: ["develop"]
+    tags:
+
+jobs:
+  docker-build-push:
+    runs-on: ubuntu-22.04
+    permissions:
+      packages: write
+      contents: read
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          context: git
+          images: ghcr.io/${{ github.repository }}
+          flavor: |
+            latest=auto
+          tags: |
+            type=ref,event=tag
+            type=semver,pattern={{version}}
+            type=ref,event=branch
+            type=ref,event=branch,suffix=-{{date 'YYYYMMDDHHmm'}}
+            type=sha,enable=true,prefix=sha-,format=short
+        env:
+          DOCKER_METADATA_ANNOTATIONS_LEVELS: manifest,index
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          provenance: false
+          platforms: linux/amd64, linux/arm64
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          annotations: ${{ steps.meta.outputs.annotations }}
+          build-args: |
+            RUST_RELEASE_MODE=release
+            CARGO_BUILD_FEATURES=default

.gitignore

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+/target

Dockerfile

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+FROM rust:latest AS builder
+
+WORKDIR /app
+COPY . /app
+
+RUN apt-get update && apt-get install --no-install-recommends -y clang
+RUN cargo build --release
+
+FROM ubuntu:latest
+
+ARG DEBCONF_NOWARNINGS="yes"
+ARG DEBIAN_FRONTEND noninteractive
+ARG DEBCONF_NONINTERACTIVE_SEEN true
+
+RUN apt-get update \
+ && apt-get install --no-install-recommends -y \
+    tini \
+ && apt-get clean \
+ && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+COPY --from=builder /app/target/release/ckb-bitcoin-spv-service /usr/local/bin/ckb-bitcoin-spv-service
+
+RUN chmod a+x /usr/local/bin/ckb-bitcoin-spv-service
+
+ENTRYPOINT [ "tini", "--"]
+CMD ["ckb-bitcoin-spv-service", "--help"]