Dockerfile.agent

# NetMirror Agent Image - API only, no frontend
# Optimized multi-stage build for smaller image size

# Go dependency cache layer
FROM alpine:3 AS go-deps-cache
RUN apk add --no-cache go git ca-certificates
WORKDIR /app
ADD backend/go.mod backend/go.sum ./
RUN go mod download

# Go build layer (without frontend files)
FROM go-deps-cache AS go-builder
ADD backend /app
# Create empty embed/ui directory to satisfy go:embed requirement
RUN mkdir -p /app/embed/ui && touch /app/embed/ui/.gitkeep
RUN go build -ldflags="-w -s" -o /usr/local/bin/als && chmod +x /usr/local/bin/als

# System tools layer (reusable)
FROM alpine:3 AS system-tools
WORKDIR /app
ADD scripts /app
RUN sh /app/install-software.sh && \
    sh /app/install-speedtest.sh && \
    apk add --no-cache \
        iperf iperf3 \
        mtr \
        traceroute \
        iputils \
        ca-certificates \
        tzdata && \
    rm -rf /app

# Final runtime image
FROM alpine:3
LABEL org.opencontainers.image.title="NetMirror Agent"
LABEL org.opencontainers.image.description="NetMirror agent node (API only, no UI)"
LABEL org.opencontainers.image.source="https://github.com/Yuri-NagaSaki/NetMirror"
LABEL org.opencontainers.image.licenses="MIT"

# Copy system tools and binary
COPY --from=system-tools / /
COPY --from=go-builder /usr/local/bin/als /bin/als

# Agent mode enabled by default
ENV AGENT_MODE=true

EXPOSE 3000

HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD wget -q -O /dev/null http://localhost:${HTTP_PORT:-3000}/ || exit 1

CMD ["/bin/als"]