old_contents: import flask
  import flask_sqlalchemy
  import flask_bootstrap
  import flask_login
  import flask_script
  import flask_migrate
  import flask_babel
  
  import os
  import docker
  
  
  # Create application
  app = flask.Flask(__name__, static_url_path='/admin/app_static')
  
  default_config = {
      'SQLALCHEMY_DATABASE_URI': 'sqlite:////data/main.db',
      'SQLALCHEMY_TRACK_MODIFICATIONS': False,
      'SECRET_KEY': 'changeMe',
      'DOCKER_SOCKET': 'unix:///var/run/docker.sock',
      'HOSTNAME': 'mail.mailu.io',
      'DOMAIN': 'mailu.io',
      'POSTMASTER': 'postmaster',
      'DEBUG': False,
      'BOOTSTRAP_SERVE_LOCAL': True,
      'DKIM_PATH': '/dkim/{domain}.{selector}.key',
      'DKIM_SELECTOR': 'dkim',
      'BABEL_DEFAULT_LOCALE': 'en',
      'BABEL_DEFAULT_TIMEZONE': 'UTC'
  }
  
  # Load configuration from the environment if available
  for key, value in default_config.items():
      app.config[key] = os.environ.get(key, value)
  
  # Setup components
  flask_bootstrap.Bootstrap(app)
  db = flask_sqlalchemy.SQLAlchemy(app)
  migrate = flask_migrate.Migrate(app, db)
  login_manager = flask_login.LoginManager()
  login_manager.init_app(app)
  babel = flask_babel.Babel(app)
  
  # Manager commnad
  manager = flask_script.Manager(app)
  manager.add_command('db', flask_migrate.MigrateCommand)
  
  # Connect to the Docker socket
  dockercli = docker.Client(base_url=app.config['DOCKER_SOCKET'])
  
  # Finally setup the blueprint and redirect /
  from mailu import admin
  app.register_blueprint(admin.app, url_prefix='/admin')
  
  @app.route("/")
  def index():
      return flask.redirect(flask.url_for("admin.index"))
  
new_contents: import flask
  import flask_sqlalchemy
  import flask_bootstrap
  import flask_login
  import flask_script
  import flask_migrate
  import flask_babel
  
  import os
  import docker
  
  
  # Create application
  app = flask.Flask(__name__, static_url_path='/admin/app_static')
  
  default_config = {
      'SQLALCHEMY_DATABASE_URI': 'sqlite:////data/main.db',
      'SQLALCHEMY_TRACK_MODIFICATIONS': False,
      'SECRET_KEY': 'changeMe',
      'DOCKER_SOCKET': 'unix:///var/run/docker.sock',
      'HOSTNAME': 'mail.mailu.io',
      'DOMAIN': 'mailu.io',
      'POSTMASTER': 'postmaster',
      'DEBUG': False,
      'BOOTSTRAP_SERVE_LOCAL': True,
      'DKIM_PATH': '/dkim/{domain}.{selector}.key',
      'DKIM_SELECTOR': 'dkim',
      'BABEL_DEFAULT_LOCALE': 'en',
      'BABEL_DEFAULT_TIMEZONE': 'UTC'
  }
  
  # Load configuration from the environment if available
  for key, value in default_config.items():
      app.config[key] = os.environ.get(key, value)
  
  # Setup components
  flask_bootstrap.Bootstrap(app)
  db = flask_sqlalchemy.SQLAlchemy(app)
  migrate = flask_migrate.Migrate(app, db)
  login_manager = flask_login.LoginManager()
  login_manager.init_app(app)
  babel = flask_babel.Babel(app)
  translations = list(map(str, babel.list_translations()))
  
  # Manager commnad
  manager = flask_script.Manager(app)
  manager.add_command('db', flask_migrate.MigrateCommand)
  
  # Connect to the Docker socket
  dockercli = docker.Client(base_url=app.config['DOCKER_SOCKET'])
  
  # Babel configuration
  @babel.localeselector
  def get_locale():
      return flask.request.accept_languages.best_match(translations)
  
  # Finally setup the blueprint and redirect /
  from mailu import admin
  app.register_blueprint(admin.app, url_prefix='/admin')
  
  @app.route("/")
  def index():
      return flask.redirect(flask.url_for("admin.index"))
  
subject: Select translation based on browser configuration, fixes #100