// Lines 2976-2978: Traditional build with args
$build_command = $this->wrap_build_command_with_env_export(
    "docker build {$this->buildTarget} --network {$this->destination->network} -f {$this->workdir}{$this->dockerfile_location} {$this->build_args} --progress plain -t $this->build_image_name {$this->workdir}"
);

// Lines 526: Also used in simple dockerfile deployment
executeInDocker($this->deployment_uuid, "echo '$dockerfile_base64' | base64 -d | tee {$this->workdir}{$this->dockerfile_location} > /dev/null"),

private function run_pre_deployment_command()
{
    if (empty($this->application->pre_deployment_command)) {
        return;
    }
    // ...
    $cmd = "sh -c '".str_replace("'", "'\\''", $this->application->pre_deployment_command)."'";
    $exec = "docker exec {$containerName} {$cmd}";
    $this->execute_remote_command(
        [
            'command' => $exec,
            'hidden' => true,
        ],
    );
}

if ($this->application->dockerfile_location) {
    if (!preg_match('/^[a-zA-Z0-9._\-\/]+$/', $this->application->dockerfile_location)) {
        throw new \RuntimeException("Invalid dockerfile_location: contains forbidden characters");
    }
    if (str_contains($this->application->dockerfile_location, '..')) {
        throw new \RuntimeException("Invalid dockerfile_location: path traversal detected");
    }
    $this->dockerfile_location = escapeshellarg($this->application->dockerfile_location);
}

'dockerfile_location' => [
    'string',
    'nullable',
    'regex:/^[a-zA-Z0-9._\-\/]+$/',
    'max:255'
],