假设项目包含前端vue，后台管理系统admin，后端接口api

一、分别部署，采用不同域名

前端域名：vue.shop.test
后端地址：shop.test/admin
接口地址：shop.test/api
1.在前端项目服务器的 nginx 下，根目录指向目标文件夹

server
{
    listen 80;
    server_name vue.shop.test;#域名
    index index.php index.html index.htm default.php default.htm default.html;
    root /www/wwwroot/vue.shop.test/dist;#根目录
    ...
}

2.反向代理到接口地址

#意思就是只要含有"api"的请求，都转发到接口地址去请求
location /api
    {
        add_header 'Access-Control-Allow-Origin' '*';
        proxy_pass http://shop.test/api;
    }

3.后端项目配置跨域

location / {  
    add_header Access-Control-Allow-Origin *;
    add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
    add_header Access-Control-Allow-Headers 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization';
} 

二、分别部署，采用相同域名

# demo.conf
server
    {
    listen 80;
    server_name demo.com; # 配置项目域名
    index index.html index.htm index.php;

    # 默认访问前端项目
    location / {
        # 前端打包后的静态目录
        alias /path/dist/;
        #解决页面刷新404问题
        try_files $uri $uri/ /index.html;
    }

    # 后端项目
    location ~* ^/(api|admin) {
        try_files $uri $uri/ /index.php?$query_string;
    }

    # PHP-INFO-START  PHP引用配置，可以注释或修改，写法 1 和写法 2 任意一种都可以
    # 1.宝塔写法 include enable-php-80.conf;
    location ~ \.php(.*)$ 
    {
        root  /path/public/;
        try_files $uri =404;
        fastcgi_pass  unix:/tmp/php-cgi-80.sock;
        fastcgi_index index.php;
        include fastcgi.conf;
        include pathinfo.conf;
    }
    # 2.一般写法,使用 nginx 默认提供的配置，加上 `root` 相关配置即可
    location ~ \.php(.*)$ {
        root  /path/public/;
        fastcgi_pass   127.0.0.1:9000;
        fastcgi_index  index.php;
        fastcgi_split_path_info  ^((?U).+\.php)(/?.+)$;
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        fastcgi_param  PATH_INFO  $fastcgi_path_info;
        fastcgi_param  PATH_TRANSLATED  $document_root$fastcgi_path_info;
        include        fastcgi_params;
    }
    #PHP-INFO-END

    # 前端静态资源处理
    location  ^~ /images/ {
        alias /path/dist/images/;
    }

    # 后端静态资源处理
    location  ^~ /vendor/ {
        alias /path/public/vendor/;
    }
    location  ^~ /storage/ {
        alias /path/public/storage/;
    }
}