nginx: proxy to local domain

hosts

# /etc/hosts

127.0.0.1       localhost main.zital main01.zital

local.network

# /etc/systemd/network/local.network
[Network]
DNS=127.0.0.53
Domains=main.zital main01.zital

main

# /etc/nginx/sites-available/main

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

        server_name main.zital;

        root /var/www/html;

        index index.html;

        location / {
                try_files $uri $uri/ =404;
        }

        location ~ /\.ht {
                deny all;
        }

         location /01/ {
                resolver 127.0.0.53;
                proxy_pass   http://main01.zital/;
                proxy_set_header Accept-Encoding "";
                sub_filter "http://main.zital/" "http://main.zital/01/";
                sub_filter_once off;
                sub_filter_types *;
         }

        access_log /var/log/nginx/main-access.log;
        error_log /var/log/nginx/main-error.log;
}

main01

# /etc/nginx/sites-available/main01

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

       server_name main01.zital;

       root /var/www/html;
       index index.html;

       location / {
               try_files $uri $uri/ =404;
       }

       access_log /var/log/nginx/main01-access.log;
       error_log /var/log/nginx/main01-error.log;
}

script.sh

# exec at last
# root required
systemctl daemon-reload
systemctl restart systemd-networkd
systemctl restart systemd-resolved
ln -s /etc/nginx/sites-available/main /etc/nginx/sites-enabled/main
ln -s /etc/nginx/sites-available/main01 /etc/nginx/sites-enabled/main01
/etc/init.d/nginx restart

https://unix.stackexchange.com/questions/442598/how-to-configure-systemd-resolved-and-systemd-networkd-to-use-local-dns-server-f

https://stackoverflow.com/questions/32542282/how-do-i-rewrite-urls-in-a-proxy-response-in-nginx