Dockerfile

FROM golang:1.23-alpine AS builder

# 设置工作目录
WORKDIR /app

# 安装构建依赖
RUN apk add --no-cache git ca-certificates tzdata

# 复制 go mod 文件
COPY go.mod go.sum ./

# 下载依赖
RUN go mod download

# 复制源代码
COPY . .

# 构建应用
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
    -a -installsuffix cgo \
    -ldflags='-w -s -extldflags "-static"' \
    -o go-docker-proxy .

# 运行阶段
FROM scratch

# 从构建阶段复制必要文件
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
COPY --from=builder /app/go-docker-proxy /go-docker-proxy

# 创建缓存目录
VOLUME ["/cache"]

# 暴露端口
EXPOSE 8080

# 健康检查
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD ["/go-docker-proxy", "-health-check"] || exit 1

# 设置默认环境变量
ENV PORT=8080 \
    CACHE_DIR=/cache \
    CUSTOM_DOMAIN=example.com \
    DEBUG=false

# 运行应用
ENTRYPOINT ["/go-docker-proxy"]