feat(docker): 支持通过构建参数注入编译时间

在 Dockerfile 中添加 BUILD_DATE 构建参数，并通过 ldflags 将编译时间注入到二进制文件中。
同时更新 build.sh 脚本，在构建镜像时传入当前时间作为 BUILD_DATE 参数。

refactor(build): 优化 build.sh 脚本结构与可读性

对 build.sh 脚本中的函数进行了缩进统一和结构调整，提高代码可读性和维护性。
新增 bin 命令用于直接编译并压缩二进制文件。

feat(main): 添加版本与构建信息显示功能

在 main.go 中增加 BuildDate 变量用于存储构建时间，并支持通过 -h 或 --help 参数查看帮助信息，
包括版本号、联系邮箱以及构建日期等元数据。

chore(blacklist): 移除默认黑名单条目

从 blacklist.txt 文件中移除默认的 *.baidu.com 黑名单规则。

docs(readme): 清理 README.md 文件末尾空行

删除 README.md 文件最后多余的空白行，保持文档整洁。

Dockerfile

@@ -4,8 +4,10 @@ FROM golang:1.25.2-alpine AS builder
 WORKDIR /app
 COPY . .
 
+# 使用构建参数传递编译时间
+ARG BUILD_DATE
 ENV CGO_ENABLED=0 GOOS=linux GOARCH=amd64
-RUN go build -o dot main.go
+RUN go build -a -ldflags "-X main.BuildDate=${BUILD_DATE} -extldflags '-static -lc'"
 
 # ---------- 运行阶段 ----------
 FROM alpine:3.20

README.md

@@ -159,4 +159,3 @@ kdig @127.0.0.1 +tls-ca +tls-host=dot.local www.example.com
 **Email:** [aixiao@aixiao.me](mailto:aixiao@aixiao.me)  
 **License:** MIT  
 **Repository:** [git.aixiao.me/aixiao/dot](https://git.aixiao.me/aixiao/dot)
-

blacklist.txt

@@ -1 +0,0 @@
-*.baidu.com

build.sh

@@ -27,70 +27,83 @@ KEY_FILE="jinllpay.com.key"
 # ---------- 函数区 ----------
 
 build() {
-  echo "🔨 Building Docker image: ${IMAGE_NAME}:${TAG} ..."
+    echo "🔨 Building Docker image: ${IMAGE_NAME}:${TAG} ..."
-  docker build -t "${IMAGE_NAME}:${TAG}" .
+    docker build --build-arg BUILD_DATE=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
-  echo "✅ Build complete."
+        -t "${IMAGE_NAME}:${TAG}" .
+        
+    echo "✅ Build complete."
 }
 
 run() {
-  echo "🚀 Starting container ${CONTAINER_NAME}..."
+    echo "🚀 Starting container ${CONTAINER_NAME}..."
 
-  # 确保旧容器不冲突
+    # 确保旧容器不冲突
-  if docker ps -a --format '{{.Names}}' | grep -w "${CONTAINER_NAME}" >/dev/null 2>&1; then
+    if docker ps -a --format '{{.Names}}' | grep -w "${CONTAINER_NAME}" >/dev/null 2>&1; then
-    echo "⚠️  Existing container found. Removing..."
+      echo "⚠️  Existing container found. Removing..."
-    docker rm -f "${CONTAINER_NAME}" >/dev/null 2>&1 || true
+      docker rm -f "${CONTAINER_NAME}" >/dev/null 2>&1 || true
-  fi
+    fi
 
-  docker run -d \
+    docker run -d \
-    --name "${CONTAINER_NAME}" \
+      --name "${CONTAINER_NAME}" \
-    --memory=256m \
+      --memory=256m \
-    --memory-swap=384m \
+      --memory-swap=384m \
-    --memory-reservation=128m \
+      --memory-reservation=128m \
-    -p ${PORT}:853 \
+      -p ${PORT}:853 \
-    -e CERT_FILE="/app/${CERT_FILE}" \
+      -e CERT_FILE="/app/${CERT_FILE}" \
-    -e KEY_FILE="/app/${KEY_FILE}" \
+      -e KEY_FILE="/app/${KEY_FILE}" \
-    -v "$(pwd)/${CERT_FILE}:/app/${CERT_FILE}:ro" \
+      -v "$(pwd)/${CERT_FILE}:/app/${CERT_FILE}:ro" \
-    -v "$(pwd)/${KEY_FILE}:/app/${KEY_FILE}:ro" \
+      -v "$(pwd)/${KEY_FILE}:/app/${KEY_FILE}:ro" \
-    "${IMAGE_NAME}:${TAG}"
+      "${IMAGE_NAME}:${TAG}"
 
-  echo "✅ Container started on port ${PORT}."
+    echo "✅ Container started on port ${PORT}."
 }
 
 logs() {
-  echo "📜 Showing logs..."
+    echo "📜 Showing logs..."
-  docker logs -f "${CONTAINER_NAME}"
+    docker logs -f "${CONTAINER_NAME}"
 }
 
 stop() {
-  echo "🛑 Stopping container..."
+    echo "🛑 Stopping container..."
-  docker stop "${CONTAINER_NAME}" >/dev/null 2>&1 || true
+    docker stop "${CONTAINER_NAME}" >/dev/null 2>&1 || true
-  docker rm "${CONTAINER_NAME}" >/dev/null 2>&1 || true
+    docker rm "${CONTAINER_NAME}" >/dev/null 2>&1 || true
-  echo "✅ Container stopped and removed."
+    echo "✅ Container stopped and removed."
 }
 
 clean() {
-  stop
+    stop
-  echo "🧹 Removing image ${IMAGE_NAME}:${TAG}..."
+    echo "🧹 Removing image ${IMAGE_NAME}:${TAG}..."
-  docker rmi "${IMAGE_NAME}:${TAG}" >/dev/null 2>&1 || true
+    docker rmi "${IMAGE_NAME}:${TAG}" >/dev/null 2>&1 || true
-  echo "✅ Cleanup complete."
+    echo "✅ Cleanup complete."
 }
 
 rebuild() {
-  clean
+    clean
-  build
+    build
-  run
+    run
+}
+
+bin() {
+    DATE=$(date "+%Y-%m-%dT%H:%M:%S")
+    a="'"
+    eval "CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -a -ldflags ${a}-X main.BuildDate=${DATE} -extldflags \"-static -lc\"${a}"
+
+    if test -f dot; then
+      upx -9 dot
+    fi
 }
 
 # ---------- 主逻辑 ----------
 case "$1" in
-  build) build ;;
+    bin) bin ;;
-  run) run ;;
+    build) build ;;
-  logs) logs ;;
+    run) run ;;
-  stop) stop ;;
+    logs) logs ;;
-  clean) clean ;;
+    stop) stop ;;
-  rebuild) rebuild ;;
+    clean) clean ;;
-  *)
+    rebuild) rebuild ;;
-    echo "Usage: ./build.sh [build|run|logs|stop|clean|rebuild]"
+    *)
-    exit 1
+        echo "Usage: ./build.sh [build|run|logs|stop|clean|rebuild]"
-    ;;
+        exit 1
+      ;;
 esac

main.go

@@ -19,6 +19,8 @@ import (
 	lru "github.com/hashicorp/golang-lru/v2"
 )
 
+var BuildDate = "unknown" // 由编译时注入
+
 /******************************************************************
  * 日志初始化
  ******************************************************************/
@@ -571,6 +573,7 @@ func handleDNS(
 func main() {
 	rand.Seed(time.Now().UnixNano())
 
+	var help bool
 	certFile := flag.String("cert", "server.crt", "TLS 证书文件路径")
 	keyFile := flag.String("key", "server.key", "TLS 私钥文件路径")
 	addr := flag.String("addr", ":853", "DoT 监听地址")
@@ -585,8 +588,24 @@ func main() {
 	blacklistFile := flag.String("blacklist-file", "", "黑名单文件路径（每行一个域名；支持 # 或 ; 注释；后缀匹配）")
 	blacklistRcodeFlag := flag.String("blacklist-rcode", "REFUSED", "命中黑名单返回的 RCODE：REFUSED|NXDOMAIN|SERVFAIL")
 	verbose := flag.Bool("v", false, "verbose 日志")
+
+	flag.BoolVar(&help, "h", false, "")
+	flag.BoolVar(&help, "help", false, "帮助信息")
+
 	flag.Parse()
 
+	if help {
+		fmt.Printf(
+			"\t\tDNS-over-TLS (DoT)\n"+
+				"\tVersion 0.1\n"+
+				"\tE-mail: aixiao@aixiao.me\n"+
+				"\tBuild Date: %s\n", BuildDate)
+
+		flag.Usage()
+		fmt.Printf("\n")
+		os.Exit(0)
+	}
+
 	initLogger(*verbose)
 
 	var err error