nginx配置代理后会出现两个api,变成/api/api。会重复出现配置的代理地址

nginx里边的配置文件有一个配置如下：

 location /api/ {
            proxy_pass http://oanet:5005; # 设置为本地启动地址
            proxy_http_version 1.1;
            proxy_set_header   Upgrade $http_upgrade;
            proxy_set_header   Connection $connection_upgrade;
            proxy_set_header   Host $host;
            proxy_cache_bypass $http_upgrade;
            proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;  # 解决获取不到真实的用户 IP 地址
            proxy_set_header   X-Forwarded-Proto $scheme;   # 解决获取不到真实的用户 IP 地址
        }

我请求后变成了/api/api/sysAuth/captcha,多了一个api，我想变成/api/sysAuth/captcha应该怎么配置哇