fix: deploy.sh reads MySQL config from .env instead of generating it

- Error out if .env is missing, instruct user to copy from .env.example
- Source .env to load MYSQL_* variables for docker compose
- Command-line port argument overrides PORT in .env

deploy.sh

@@ -78,48 +78,27 @@ setup_go_proxy() {
 }
 
 # ----------------------------------------------------------
-# 4. 生成 .env 配置文件
+# 4. 读取 .env 配置文件
 # ----------------------------------------------------------
-setup_env() {
+load_env() {
     local port="${1:-9050}"
 
-    if [ -f ".env" ]; then
-        warn ".env 文件已存在，跳过生成"
-        # 确保端口是最新的
-        if grep -q "^PORT=" .env; then
-            sed -i "s/^PORT=.*/PORT=${port}/" .env
-        else
-            echo "PORT=${port}" >> .env
-        fi
-        return
+    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"
     fi
 
-    info "生成 .env 配置文件..."
+    info "读取 .env 配置..."
+    set -a
+    # shellcheck disable=SC1091
+    source .env
+    set +a
 
-    # 生成随机 MySQL 密码
-    local mysql_password
-    mysql_password=$(openssl rand -base64 16 | tr -dc 'a-zA-Z0-9' | head -c 20)
+    # 命令行参数覆盖 .env 中的 PORT
+    if [ -n "$port" ]; then
+        export PORT="$port"
+    fi
 
-    cat > .env <<EOF
-# Server
-PORT=${port}
-GIN_MODE=release
-SESSION_SECRET=
-
-# Data directory
-DATA_DIR=data
-
-# MySQL
-MYSQL_HOST=mysql
-MYSQL_PORT=3306
-MYSQL_USER=root
-MYSQL_PASSWORD=${mysql_password}
-MYSQL_DATABASE=pr_helper
-EOF
-
-    info ".env 文件已生成"
-    info "MySQL 密码: ${mysql_password}"
-    warn "请妥善保管 .env 文件中的数据库密码！"
+    info "MySQL: ${MYSQL_USER}@${MYSQL_HOST}:${MYSQL_PORT}/${MYSQL_DATABASE}"
 }
 
 # ----------------------------------------------------------
@@ -184,7 +163,7 @@ main() {
     check_docker
     setup_docker_mirror
     setup_go_proxy
-    setup_env "$port"
+    load_env "$port"
     build_and_start "$port"
 }