Composer bootstrapped Drupal scaffold.

composer.json

{
    "name"              : "vendor/project",
    "description"       : "Much awesome. So wow.",
    "type"              : "project",
    "license"           : "MIT",
    "authors"           : [
        {
            "name"  : "Firstname Lastname",
            "email" : "user@example.com",
            "role"  : "Developer"
        }
    ],
    "repositories"      : [
        {
            "type" : "composer",
            "url"  : "https://packages.drupal.org/8"
        },
        {
            "type"    : "package",
            "package" : {
                "name"    : "enyo/dropzone",
                "version" : "dev-master",
                "type"    : "drupal-library",
                "dist"    : {
                    "url"  : "https://github.com/enyo/dropzone.git",
                    "type" : "drupal-library"
                },
                "source"  : {
                    "url"       : "https://github.com/enyo/dropzone.git",
                    "type"      : "git",
                    "reference" : "origin/master"
                }
            }
        }
    ],
    "require"           : {
        "composer/installers"             : "^1.2",
        "drupal-composer/drupal-scaffold" : "^2.2",
        "cweagans/composer-patches"       : "~1.0",
        "drupal/core"                     : "~8.2",
        "drush/drush"                     : "~8.0",
        "drupal/console"                  : "~1.0",
        "drupal/entity_browser"           : "8.1.0-alpha1",
        "drupal/devel"                    : "dev-8.x-1.x",
        "drupal/inline_entity_form"       : "8.1.0-alpha2",
        "drupal/dropzonejs"               : "8.1.*@dev",
        "enyo/dropzone"                   : "dev-master"
    },
    "require-dev"       : {
        "behat/mink"                           : "~1.7",
        "behat/mink-goutte-driver"             : "~1.2",
        "jcalderonzumba/gastonjs"              : "~1.0.2",
        "jcalderonzumba/mink-phantomjs-driver" : "~0.3.1",
        "mikey179/vfsStream"                   : "~1.2",
        "phpunit/phpunit"                      : "~4.8",
        "symfony/css-selector"                 : "~2.8"
    },
    "conflict"          : {
        "drupal/drupal" : "*"
    },
    "minimum-stability" : "dev",
    "prefer-stable"     : true,
    "autoload"          : {
        "classmap" : [
            "scripts/composer/ScriptHandler.php"
        ]
    },
    "scripts"           : {
        "drupal-scaffold"  : "DrupalComposer\\DrupalScaffold\\Plugin::scaffold",
        "pre-install-cmd"  : [
            "DrupalProject\\composer\\ScriptHandler::checkComposerVersion"
        ],
        "pre-update-cmd"   : [
            "DrupalProject\\composer\\ScriptHandler::checkComposerVersion"
        ],
        "post-install-cmd" : [
            "DrupalProject\\composer\\ScriptHandler::createRequiredFiles"
        ],
        "post-update-cmd"  : [
            "DrupalProject\\composer\\ScriptHandler::createRequiredFiles"
        ]
    },
    "extra"             : {
        "installer-paths" : {
            "web/core"                     : [
                "type:drupal-core"
            ],
            "web/sites/libraries/{$name}"  : [
                "type:drupal-library"
            ],
            "web/modules/contrib/{$name}"  : [
                "type:drupal-module"
            ],
            "web/profiles/contrib/{$name}" : [
                "type:drupal-profile"
            ],
            "web/themes/contrib/{$name}"   : [
                "type:drupal-theme"
            ],
            "drush/contrib/{$name}"        : [
                "type:drupal-drush"
            ]
        }
    }
}