Ping service timeout

[Canti23]

Description

Added support for the timeout option for the Ping service. The default value is 2000 ms, which should be sufficient for most services.

Fixes #804

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I've read & comply with the contributing guidelines
• I have tested my code for new features & regressions on both mobile & desktop devices, using the latest version of major browsers.
• I have made corresponding changes to the documentation (README.md).
• I've checked my modifications for any breaking changes, especially in the config.yml file

[bastienwirtz]

Small suggestion regarding the doc, aside from that, it's all good. Thanks @Canti23 !

[Canti23]

Thanks, thought about that, but haven't figured out how to write it succinctly :)