fix: upgrade Docker base image to golang:1.25-alpine for go.mod compatibility

Dockerfile

@@ -1,5 +1,5 @@
 # Build stage
-FROM golang:1.24-alpine AS builder
+FROM golang:1.25-alpine AS builder
 WORKDIR /app
 COPY go.mod go.sum ./
 RUN go mod download

deploy.sh

@@ -81,10 +81,8 @@ setup_go_proxy() {
 # 4. 读取 .env 配置文件
 # ----------------------------------------------------------
 load_env() {
-    local port="${1:-9050}"
-
     if [ ! -f ".env" ]; then
-        error ".env 文件不存在，请先执行: cp .env.example .env 并填写 MySQL 连接信息"
+        error ".env 文件不存在，请先执行: cp .env.example .env 并填写配置"
     fi
 
     info "读取 .env 配置..."
@@ -93,11 +91,10 @@ load_env() {
     source .env
     set +a
 
-    # 命令行参数覆盖 .env 中的 PORT
-    if [ -n "$port" ]; then
-        export PORT="$port"
-    fi
+    # 端口默认值
+    export PORT="${PORT:-8080}"
 
+    info "服务端口: ${PORT}"
     info "MySQL: ${MYSQL_USER}@${MYSQL_HOST}:${MYSQL_PORT}/${MYSQL_DATABASE}"
 }
 
@@ -105,8 +102,6 @@ load_env() {
 # 5. 构建并启动服务
 # ----------------------------------------------------------
 build_and_start() {
-    local port="${1:-9050}"
-
     info "构建 Docker 镜像（首次可能需要几分钟）..."
     docker compose build
 
@@ -136,10 +131,8 @@ build_and_start() {
         info "=========================================="
         info "  PR-Helper 部署成功！"
         info "=========================================="
-        info "访问地址: http://$(hostname -I | awk '{print $1}'):${port}"
-        info "本地访问: http://localhost:${port}"
-        info ""
-        info "数据库配置: .env"
+        info "访问地址: http://$(hostname -I | awk '{print $1}'):${PORT}"
+        info "本地访问: http://localhost:${PORT}"
         info ""
         info "常用命令:"
         info "  查看日志:  docker compose logs -f"
@@ -155,16 +148,13 @@ build_and_start() {
 # 主流程
 # ----------------------------------------------------------
 main() {
-    local port="${1:-9050}"
-
     info "开始部署 PR-Helper..."
-    info "目标端口: ${port}"
 
     check_docker
     setup_docker_mirror
     setup_go_proxy
-    load_env "$port"
-    build_and_start "$port"
+    load_env
+    build_and_start
 }
 
 main "$@"