nginx.conf

server {
    access_log      /var/logs/nginx/a/access.log;
    error_log       /var/logs/nginx/a/error.log;

    listen          443 ssl;
    server_name     ServiceA.local.io;

    location / {
    proxy_pass  http://10.0.0.2$request_uri;
    }
}
server {
    access_log      /var/logs/nginx/b/access.log;
    error_log       /var/logs/nginx/b/error.log;

    listen          443 ssl;
    server_name     ServiceB.local.io;

    location / {
    proxy_pass  http://10.0.0.3$request_uri;
    }
}

template.toml

{{range $service :=  "/nginx/services/*/"}}
server {
    access_log      /var/logs/nginx/{{$service.shortname}}/access.log;
    error_log       /var/logs/nginx/{{$service.shortname}}/error.log;

    listen          443 ssl;
    server_name     {{$service.name}}.local.io;

    location / {
    proxy_pass  http://{{$service.address}}.local.io$request_uri;
    }
}
{{end}}