fix: 修复前端访问错误

docker-compose.yml

@@ -22,6 +22,18 @@ services:
       context: ./backend
     container_name: exam-helper-backend
     restart: unless-stopped
+    healthcheck:
+      test:
+        [
+          "CMD",
+          "python",
+          "-c",
+          "import urllib.request; urllib.request.urlopen('http://127.0.0.1:8000/health', timeout=3).read()",
+        ]
+      interval: 5s
+      timeout: 5s
+      retries: 12
+      start_period: 25s
     # AI 相关变量优先从 .env.example 注入；若存在 .env 则覆盖同名项（见 Compose env_file 顺序）
     env_file:
       - .env.example
@@ -46,7 +58,8 @@ services:
     container_name: exam-helper-frontend
     restart: unless-stopped
     depends_on:
-      - backend
+      backend:
+        condition: service_healthy
     ports:
       - "127.0.0.1:8173:80"
 

frontend/.dockerignore

@@ -0,0 +1,7 @@
+node_modules
+dist
+.git
+.gitignore
+*.md
+.DS_Store
+npm-debug.log*

frontend/Dockerfile

@@ -9,7 +9,9 @@ COPY package.json /app/package.json
 RUN npm config set registry https://registry.npmmirror.com && npm install
 
 COPY . /app
-RUN npm run build
+RUN npm run build \
+  && test -f /app/dist/index.html \
+  && ls -la /app/dist
 
 FROM nginx:1.27-alpine
 RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories

start.sh

@@ -18,8 +18,24 @@ else
   echo "==> AI 配置来自 .env.example（请填写 QWEN_API_KEY；亦可复制为 .env 再填写）"
 fi
 
-echo "==> 健康检查（端口与 docker-compose.yml 一致：后端 8866，前端 Nginx 8173）"
-echo "backend: $(curl -sf http://localhost:8866/health || echo 'unreachable')"
-echo "frontend (nginx): $(curl -sf http://localhost:8173/health || echo 'unreachable')"
+wait_http() {
+  local url=$1
+  local label=$2
+  local i=0
+  while [[ $i -lt 45 ]]; do
+    if curl -sf "$url" >/dev/null 2>&1; then
+      echo "${label}: ok"
+      return 0
+    fi
+    sleep 1
+    i=$((i + 1))
+  done
+  echo "${label}: unreachable（请确认容器已就绪，或执行: curl -v ${url}）"
+  return 1
+}
+
+echo "==> 健康检查（后端 8866，前端 Nginx 8173；最多等待约 45s）"
+wait_http "http://localhost:8866/health" "backend" || true
+wait_http "http://localhost:8173/health" "frontend (nginx)" || true
 
 echo "==> 启动完成"