Dockerfile

# Build stage
FROM golang:1.25-alpine AS builder

WORKDIR /app

# Install build dependencies
RUN apk add --no-cache git ca-certificates tzdata

# Copy go mod files first for better caching
COPY go.mod go.sum ./
RUN go mod download

# Copy source code
COPY . .

# Build the binary with optimizations
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
    -ldflags="-w -s" \
    -o /app/hsm \
    main.go

# Final stage
FROM alpine:3.21

WORKDIR /app

# Install runtime dependencies
RUN apk add --no-cache ca-certificates tzdata && \
    addgroup -g 1000 hsm && \
    adduser -u 1000 -G hsm -s /bin/sh -D hsm

# Copy binary from builder
COPY --from=builder /app/hsm /usr/local/bin/hsm

# Copy entrypoint script
COPY docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh
RUN chmod +x /usr/local/bin/docker-entrypoint.sh

# Create data directory
RUN mkdir -p /data && chown -R hsm:hsm /data

# Switch to non-root user
USER hsm

# Set working directory to data for session storage
WORKDIR /data

# Expose default port
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:${HSM_PORT:-8080}/health || exit 1

ENTRYPOINT ["docker-entrypoint.sh"]
CMD ["serve"]