{
    "project_name": "Project Name",
    "project_slug": "{{ cookiecutter.project_name.lower()|replace(' ', '_')|replace('-', '_') }}",
    "author_name": "Daniel Roy Greenfeld",
    "email": "you@example.com",
    "description": "A short description of the project.",
    "domain_name": "example.com",
    "version": "0.1.0",
    "timezone": "UTC",
    "use_whitenoise": "y",
    "use_celery": "n",
    "use_mailhog": "n",
    "use_sentry_for_error_reporting": "y",
    "use_opbeat": "n",
    "use_pycharm": "n",
    "windows": "n",
    "use_python3": "y",
    "use_docker": "y",
    "use_heroku": "n",
    "use_elasticbeanstalk_experimental": "n",
    "use_compressor": "n",
    "postgresql_version": ["9.6", "9.5", "9.4", "9.3", "9.2"],
    "js_task_runner": ["Gulp", "Grunt", "None"],
    "use_lets_encrypt": "n",
    "open_source_license": ["MIT", "BSD", "GPLv3", "Apache Software License 2.0", "Not open source"]
}

{
    "project_name": "Project Name",
    "project_slug": "{{ cookiecutter.project_name.lower()|replace(' ', '_')|replace('-', '_') }}",
    "author_name": "Daniel Roy Greenfeld",
    "email": "you@example.com",
    "description": "A short description of the project.",
    "domain_name": "example.com",
    "version": "0.1.0",
    "timezone": "UTC",
    "use_whitenoise": "y",
    "use_celery": "n",
    "use_mailhog": "n",
    "use_sentry_for_error_reporting": "y",
    "use_opbeat": "n",
    "use_pycharm": "n",
    "windows": "n",
    "use_python3": "y",
    "use_docker": "n",
    "use_heroku": "n",
    "use_elasticbeanstalk_experimental": "n",
    "use_compressor": "n",
    "postgresql_version": ["9.6", "9.5", "9.4", "9.3", "9.2"],
    "js_task_runner": ["Gulp", "Grunt", "None"],
    "use_lets_encrypt": "n",
    "open_source_license": ["MIT", "BSD", "GPLv3", "Apache Software License 2.0", "Not open source"]
}

Change Docker to be an option, not the default.
Change Docker to be an option, not the default.