nginx配置如下：
nginx.conf

user www-data;
worker_processes auto;
pid /run/nginx.pid;

events {
        worker_connections 768;
        # multi_accept on;
}

http {
        sendfile on;
        keepalive_timeout 65;
        types_hash_max_size 2048;

        include /etc/nginx/mime.types;
        default_type application/octet-stream;

        ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
        ssl_prefer_server_ciphers on;

        access_log /var/log/nginx/access.log;
        error_log /var/log/nginx/error.log;

        gzip on;
        gzip_disable "msie6";

        access_log /var/log/nginx/access.log;
        error_log /var/log/nginx/error.log;
        
        gzip on;
        gzip_disable "msie6";

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;
}

sites-enabled > default

server {
        listen 80 default_server;
        listen [::]:80 default_server;

        # Add index.php to the list if you are using PHP
        index index.html index.htm index.nginx-debian.html;

        server_name _;

        location / {
                # First attempt to serve request as file, then
                # as directory, then fall back to displaying a 404.
                proxy_pass http://127.0.0.1:3000;
        }
        location /admin/ {
            root /root/cms-admin/dist;
            try_files $uri $uri/ /index.html;
            index index.html index.htm;
        }
        location ~ .*\.(js|css|png|jpg|gif|swf|ico|pdf|mov|mp3|wav|json|woff2)$ {
            proxy_pass http://127.0.0.1:3000;
        }

        location /api/ {
            proxy_pass  http://127.0.0.1:3002/api/;
        }

}

3000端口跑了一个ssr项目，可以正常访问
访问xxx/admin返回500,请问是哪里出了问题
可以确定/root/cms-admin/dist下存在index.html文件