Config check mode

[movinfinex]

Describe the feature request

Many servers have the option to quit after loading and validating the configuration. (E.g., nginx -t and haproxy -c)

I suggest making either gatus -c or gatus check quit before entering the monitoring loop. Gatus doesn't have any command line flags or subcommands, yet, but there are related issues (#901) that could also be resolved with them.

Why do you personally want this feature to be implemented?

I want to sanity check configuration in CI/CD pipelines.

How long have you been using this project?

New user.

Additional information

I'm willing to contribute a PR if the feature sounds good.

[maxexcloo]

Amazing timing, I was literally about to ask this also! I run gatus with Tailscale and config check mode would be amazing to prevent extra ephemeral device creation 👍🏻

[amai2012]

Related issue: #533