How to reverse proxy the jitsi of the intranet？

Install & Config
1

Install jitsi on the intranet server, let the public server use nginx reverse proxy, and then use the domain name to access.
Self-signed domain name: abche.com
Hosts configuration: 172.18.0.67 abche.com
Nginx reverse proxy configuration:

server {
listen 80;
server_name jsitest.soft.cn;

return 301 https://$host$request_uri;

}

server {
listen 443 ssl;
server_name jsitest.soft.cn;
client_max_body_size 100M;
charset UTF-8;
client_header_buffer_size 10k;
large_client_header_buffers 4 16k;

ssl_certificate /app/ssl/soft.cn.pem;
ssl_certificate_key /app/ssl/soft.cn.key;

    location / {
            proxy_pass https://abche.com;
    }

error_page   500 502 503 504  /50x.html;
location = /50x.html {
    root   /usr/share/nginx/html;
}

}

Because I have configured 172.18.0.67 abche.com in the hosts file of my computer and the server of nginx
image

Why not configure hosts to achieve this effect？