1. Create folder on root for example "medical".
2. Extract all installation file into this folder, except "public" folder from .zip file.
3. Copy all files from "public" folder from .zip file to "public_html" folder.
4. Open server.php and change these two lines

if ($uri !== '/' && file_exists(__DIR__.'/public'.$uri)) {
return false;
}
require_once __DIR__.'/public/index.php';

to,
if ($uri !== '/' && file_exists(__DIR__.'/public_html'.$uri)) {
return false;
}
require_once __DIR__.'/public_html/index.php';

5. Open index.php file from public_html folder and change these two lines

require __DIR__.'/../vendor/autoload.php';
$app = require_once __DIR__.'/../bootstrap/app.php';

to,

require __DIR__.'/../medical/vendor/autoload.php';
$app = require_once __DIR__.'/../medical/bootstrap/app.php';

where "medical" is your folder name.

6. Start phpmyadmin tool, create databes and import from .zip file tables.sql.
7. Thats all :)

For VPS you must enable iconv and mbstring extension for PHP.
PHP version must be 7.0 or 7.1