TYPO3 (v12) deployment with PHP Deployer (only deployer.php file)

deployer.php

<?php

namespace Deployer;

require 'recipe/common.php';

/**
 * Configuration for TYPO3 deployment (v12)
 * Based on a Hetzner server and a GitHub repository
 * Deployer version: 7.3.3
 * Default TYPO3 recipe: vendor/deployer/deployer/recipe/typo3.php
 * More general details under https://deployer.org/docs/7.x/getting-started
 *
 * It is possible that the configurations need to be expanded in addition
 * to the "placeholder" parameters or adapted to the existing server structure
 */

// One of:
// - chown
// - chgrp
// - chmod
// - acl
// - sticky
// - skip
set('writable_mode', 'chmod');

// set your repository which should be deployed
set('repository', 'git@github.com:organization-name/deploy-typo3.git');
// set your branch which shold be deployed
set('branch', 'deploy/typo3-v12');

// set releases to keep
set('keep_releases', 3);
// set your TYPO3 webroot
set('typo3_webroot', 'public');
// disable use of multiple interactive sessions or multiple tunneled connections
set('ssh_multiplexing', false);


// server/host configuration
host('deploy-typo3-v12')
    ->set('hostname', '123456.your-server.de') // hostname or IP address
    ->set('remote_user', 'your_remote_user') // default: RemoteUser from ~/.ssh/config file or current OS username
    ->set('deploy_path', '/path/to/typo3') // absolute path on the server
    ->set('identity_file', '~/.ssh/id_rsa') // private key for SSH authentication
    ->set('port', 222) // default: 22
    ->set('labels', ['stage' => 'staging']); // optional: host selector (useful if you have multiple hosts)

// shared TYPO3 directories
add('shared_dirs', [
    'config',
    '{{typo3_webroot}}/fileadmin',
    '{{typo3_webroot}}/typo3temp'
]);

// shared TYPO3 files
add('shared_files', [
    '{{typo3_webroot}}/.htaccess',
    '{{typo3_webroot}}/.htpasswd'
]);

// writeable TYPO3 directories
add('writable_dirs', [
    'config',
    'var',
    '{{typo3_webroot}}/_assets',
    '{{typo3_webroot}}/fileadmin',
    '{{typo3_webroot}}/typo3temp',
    '{{typo3_webroot}}/typo3conf'
]);

// define specific TYPO3 setup tasks
task('deploy:setup_typo3', function () {
    cd('{{release_path}}');
    run('php composer install --no-dev 2>&1');
    // add your required TYPO3 setup tasks here
});

// sample task (could be executed with "vendor/bin/dep test_task -v")
task('test_task', function () {
    run('whoami');
});

// define main TYPO3 deployment task
// run with "vendor/bin/dep deploy"
desc('Deploys your project');
task('deploy', [
    'deploy:prepare', // see vendor/deployer/deployer/recipe/common.php for single steps
    'deploy:setup_typo3',
    'deploy:publish', // see vendor/deployer/deployer/recipe/common.php for single steps
]);

// define tasks to run after specific task
// also possible to define task that run before other tasks
after('deploy:failed', 'deploy:unlock');