Build & Auto-Publish Workflow

.github/workflows/publish-backend.yml

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+name: Publish Backend Container
+
+on:
+  push:
+    branches: [ "main" ]
+    paths:
+      - 'backend/**'
+      - '.github/workflows/publish-backend.yml'
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to the Container registry
+        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 }}
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=sha,format=short
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./backend
+          file: ./backend/Dockerfile_build_and_publish
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+

backend/Dockerfile_build_and_publish

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+# Builder stage
+FROM rust:1.91-slim AS builder
+
+# Install build dependencies
+RUN apt-get update && apt-get install -y \
+    git \
+    curl \
+    gcc \
+    g++ \
+    cmake \
+    pkg-config \
+    libssl-dev \
+    libclang-dev \
+    libzstd-dev \
+    libhugetlbfs-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
+WORKDIR /usr/src/app
+
+# Copy all source files
+COPY . .
+
+# Build the binary
+RUN cargo build --release --bin backend
+
+# Runtime stage
+FROM debian:bookworm-slim AS runtime
+
+# Install runtime dependencies
+RUN apt-get update && apt-get install -y \
+    libssl3 \
+    libzstd1 \
+    libhugetlbfs0 \
+    ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
+WORKDIR /usr/src/app
+
+# Copy the compiled binary from the builder stage
+COPY --from=builder /usr/src/app/target/release/backend /usr/local/bin/backend
+
+# Expose WebSocket port
+EXPOSE 8443
+
+# Set entrypoint
+ENTRYPOINT ["backend"]
+CMD ["--server-addr", "0.0.0.0:8443"]
+