fix: 添加生产环境 Nginx 配置，修复 Slim base path 导致 API 404

- 显式设置 SCRIPT_NAME 为 /index.php，避免 PHP-FPM 推断为 /api/index.php
- 否则 Slim 4 认为 base path 是 /api，路由 /api/conversations 匹配失败

2026-05-15

nginx.conf

@@ -0,0 +1,43 @@
+server {
+    listen 80;
+    server_name localhost;
+
+    # 前端静态文件
+    root /var/www/dist;
+    index index.html;
+
+    # 文件上传限制
+    client_max_body_size 50M;
+
+    # API 路由 → PHP-FPM
+    location /api/ {
+        fastcgi_pass chat-php:9000;
+        fastcgi_index index.php;
+        include fastcgi_params;
+
+        # 关键：硬编码 PHP 入口，让 Slim 正确解析路由
+        fastcgi_param SCRIPT_FILENAME /var/www/html/public/index.php;
+        
+        # 关键：显式设置 SCRIPT_NAME 为空 base path
+        # 否则 PHP-FPM 会推断为 /api/index.php，导致 Slim 路由匹配失败
+        fastcgi_param SCRIPT_NAME /index.php;
+        
+        fastcgi_read_timeout 300;
+
+        # HTTPS 反向代理头
+        fastcgi_param HTTPS on;
+        fastcgi_param HTTP_X_FORWARDED_PROTO https;
+        fastcgi_param HTTP_X_FORWARDED_HOST www.eryang.wang;
+    }
+
+    # SPA 路由回退：所有非 API 请求返回 index.html
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # 静态资源缓存
+    location ~* \.(css|js|png|jpg|jpeg|gif|ico|svg|woff|woff2)$ {
+        expires 1M;
+        add_header Cache-Control "public, immutable";
+    }
+}