Can you recommend services for monitoring application uptime?

Question

Monitoring

Hello! Has anyone used an application uptime monitoring service like UptimeRobot or Statping ?
You need to find an alternative service that meets the following criteria:
1. Ability to run in docker.
2. Flexible configuration of all parameters through the settings file (Statping also has a configuration file, but this file contains a minimum number of settings and is essentially useless. Through this file, you cannot, for example, edit the list of services, for some reason it stores all important settings in the database data)
3. The presence of a role model and authorization so that you can protect data with a password.
4. The ability to track downtime history (on what day and how long the service was unavailable), as well as the total uptime percentage.

Statping really likes its functionality - a beautiful interface, easy setup, a mobile application and the ability to run in the docker. One big drawback - all configuration is done through the GUI, and the configuration file itself is not so flexible. I would like to find a similar alternative to Statping, but with the ability to configure through the config file.