it turns out that there is a php project on the server, and the default port 80 is used. Later, I need to add one. Because all the pages are static,
, I want to directly use ngnix to access it, and then modify the apache2 port of the php project to 808Perspect Nginx listening on port 80,

    upstream a_pool{
    server 127.0.0.1:8088;
}
upstream b_pool{
    server 127.0.0.1:80;
}
server {
    listen       80;
    server_name  a.com;
    access_log logs/a.log;
    error_log logs/a.error;
    -sharpdemo_pool
    location / {
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://a_pool;
    }
}
server {
    listen       80;
    server_name  b.com;
    access_log logs/b.log;
    error_log logs/b.error;
    
    -sharpdemo_pool
    location / {
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://b_pool;
    }
}

this configuration causes both domain names to point to a.com
I want to point to nginx/html/.