Dockerfile

# Build stage
FROM rust:latest AS builder

# Install build dependencies
RUN apt-get update && apt-get install -y \
    pkg-config \
    libssl-dev \
    && rm -rf /var/lib/apt/lists/*

# Create app directory
WORKDIR /app

# Copy manifests
COPY Cargo.toml Cargo.lock ./

# Copy source code
COPY src ./src
COPY migrations ./migrations
COPY static ./static
COPY *.html ./

# Build release binary
RUN cargo build --release

# Runtime stage
FROM debian:bookworm-slim

# Install runtime dependencies
RUN apt-get update && apt-get install -y \
    ca-certificates \
    libssl3 \
    && rm -rf /var/lib/apt/lists/*

# Create non-root user
RUN useradd -m -u 1000 pubsub && \
    mkdir -p /app && \
    chown -R pubsub:pubsub /app

# Set working directory
WORKDIR /app

# Copy binary from builder
COPY --from=builder --chown=pubsub:pubsub /app/target/release/pubsub_server .

# Switch to non-root user
USER pubsub

# Expose port
EXPOSE 5000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD ["/bin/sh", "-c", "wget --no-verbose --tries=1 --spider http://localhost:5000/health || exit 1"]

# Run the binary
CMD ["./pubsub_server"]