diff --git a/backend/Dockerfile b/backend/Dockerfile
index 3eb041b..2e1fe86 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -2,13 +2,13 @@
 FROM golang:1.26-alpine AS builder
 
 RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories
-RUN apk add --no-cache git
+RUN apk add --no-cache git gcc musl-dev
 WORKDIR /src
 COPY go.mod go.sum ./
 RUN go env -w GOPROXY=https://goproxy.cn,direct && go mod download
 
 COPY . .
-RUN CGO_ENABLED=0 GOOS=linux go build -o /bin/gen2d ./cmd/main.go
+RUN CGO_ENABLED=1 GOOS=linux go build -o /bin/gen2d ./cmd/main.go
 
 # ---- Runtime Stage ----
 FROM alpine:3.20
diff --git a/docs/api.md b/docs/api.md
index 2a508ee..5c6f9ba 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -57,7 +57,7 @@ Token 过期或无效时返回：
 
 ## 用户认证
 
-> **注意：** 后端代码实际注册路径为 `/auth/*`（非 `/api/v1/auth/*`），前端 Vite 代理已配置 `/auth` 转发。
+> **注意：** 后端代码实际注册路径为 `/auth/*`（非 `/api/v1/auth/*`），前端 Vite 代理及 nginx 均已配置 `/auth` 转发。
 
 | 状态 | 方法 | 路径 | 说明 |
 |------|------|------|------|
diff --git a/frontend/nginx.conf b/frontend/nginx.conf
index 6eb4544..0a6a0c8 100644
--- a/frontend/nginx.conf
+++ b/frontend/nginx.conf
@@ -18,4 +18,13 @@ server {
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header X-Forwarded-Proto $scheme;
     }
+
+    # 反向代理 /auth 到后端服务
+    location /auth/ {
+        proxy_pass http://backend:8080;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
 }