add: docker and ci

Author: qingyiwebt

.dockerignore

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+target/

.github/workflows/swiftstream-container.yml

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+name: OCI container image for swiftstream
+
+on: 
+  push:
+    tags: [ 'v*.*.*' ]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+    - uses: actions/checkout@v4
+    - name: Log in to the GHCR
+      uses: docker/login-action@v3
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Extract metadata (tags, labels) for Docker
+      id: meta
+      uses: docker/metadata-action@v5
+      with:
+        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v3
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Build and push Docker image
+      id: push
+      uses: docker/build-push-action@v6
+      with:
+        platforms: linux/amd64,linux/arm64
+        context: .
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        

Dockerfile

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+# Builder
+FROM rust:alpine AS builder
+WORKDIR /app
+COPY . .
+RUN apk add --no-cache --update alpine-sdk openssl-dev openssl-libs-static && \
+    cargo build --release
+
+# Production
+FROM alpine AS prod
+
+COPY --from=builder /app/target/release/swiftstream .
+
+CMD [ "./swiftstream" ]