Add support for environment variables

Check the readme file to see what has been added.

Add support for HTTP check

This release adds support for Http check, among other checks, for more info check the README.

Add Support for PostgresSQL

Check the README, and you will find necessary information regarding how to use PostgresSQL.

Add Support for MySQL

This release introduces numerous refactoring to the codes and also adds support for checking MySQL service status.

Also, note that checking MySQL will check if the service is ready for accepting connections and not just checking if the port is open.

First release

This is the first release with basic functionality, it needs improvement and further testing.
Currently, only build for Linux x86_64 is supported on releases, if you need other arch or os just open an issue.