Dockerfile

# Multi-stage Dockerfile for RedisGate
# Stage 1: Build the application
FROM rust:1.75-slim as builder

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

# Set working directory
WORKDIR /app

# Copy dependency files first for better caching
COPY Cargo.toml Cargo.lock* ./

# Create a dummy main.rs to build dependencies
RUN mkdir src && echo "fn main() {}" > src/main.rs

# Build dependencies (this layer will be cached unless dependencies change)
RUN cargo build --release && rm -rf src

# Copy the actual source code
COPY src ./src

# Build the application
RUN cargo build --release

# Stage 2: Create the runtime image
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 a non-root user
RUN useradd -r -s /bin/false redisgate

# Set working directory
WORKDIR /app

# Copy the binary from builder stage
COPY --from=builder /app/target/release/redisgate /app/redisgate

# Change ownership to non-root user
RUN chown redisgate:redisgate /app/redisgate

# Switch to non-root user
USER redisgate

# Expose the application port
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8080/health || exit 1

# Set default environment variables
ENV RUST_LOG=info
ENV APP_HOST=0.0.0.0
ENV APP_PORT=8080

# Run the application
CMD ["./redisgate"]