old_contents: 
  from flask import request, jsonify, render_template, Response, abort
  from campaign_manager import campaign_manager
  
  
  @campaign_manager.route('/campaign_manager')
  def home():
      """Home page view.
  
      On this page a map and the report will be shown.
      """
      context = dict(
          testing='hello'
      )
      # noinspection PyUnresolvedReferences
      return render_template('index.html', **context)
  
new_contents: 
  from flask import request, jsonify, render_template, Response, abort
  from campaign_manager import campaign_manager
  
  
  @campaign_manager.route('/')
  def home():
      """Home page view.
  
      On this page a map and the report will be shown.
      """
      context = dict(
          testing='hello'
      )
      # noinspection PyUnresolvedReferences
      return render_template('index.html', **context)
  
subject: Update campaign manager route