找到 根目录下 /etc/nginx/nginx.conf 文件

http {
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;

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

    # Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.
    include /etc/nginx/conf.d/*.conf;
    upstream localserver{
       server 192.168.x.x:80;    **//配置代理的服务器地址**
    }

    server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        server_name  _;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

       location ^~ /api/  {
          proxy_pass http://localserver;   **//api前面的部分将被替换成localserver的地址**
       }
      
       location / {
        try_files $uri $uri/ /index.html;   //vue history 模式需要配置 否则404错误
        }
    

       # error_page 404 /404.html{
       #     location = /40x.html; 
       # }

       # error_page 500 502 503 504 /50x.html{
       #     location = /50x.html; 
       # }
    }