# ============================================================
# Stage 1: Build
# ============================================================
FROM golang:1.24-alpine AS builder

WORKDIR /build

# 依赖缓存层（变更少，利用 Docker 缓存加速）
COPY go.mod go.sum ./
RUN go mod download

# 编译
COPY . .
RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o api-server .

# ============================================================
# Stage 2: Runtime
# ============================================================
FROM alpine:3.21

RUN apk add --no-cache ca-certificates tzdata

WORKDIR /app

COPY --from=builder /build/api-server .

# ip2region.xdb 运行时数据目录（卷挂载或 COPY）
RUN mkdir -p /app/data

EXPOSE 8080

ENTRYPOINT ["./api-server", "serve"]