# ── Stage 1: Build ──────────────────────────────────────────────────────────
FROM golang:1.21-alpine AS builder
WORKDIR /build
COPY go.mod main.go ./
# Statisch gelinkt, minimales Binary (~5 MB)
RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o marker-api .

# ── Stage 2: Run ─────────────────────────────────────────────────────────────
# alpine:3.19 ≈ 8 MB Basis, wget für Healthcheck
FROM alpine:3.19
RUN apk add --no-cache wget
COPY --from=builder /build/marker-api /usr/local/bin/marker-api

EXPOSE 3000
ENV PORT=3000

HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
  CMD wget -qO- http://localhost:3000/health || exit 1

ENTRYPOINT ["marker-api"]