Add excludedPathPatterns for bypassing geoblock checks

[taylorgibb]

Introduces the excludedPathPatterns config option, allowing requests matching specified regex patterns (against the full domain+path) to bypass all geoblock checks. Updates the middleware logic, configuration, and documentation, and adds comprehensive tests for various exclusion scenarios and invalid patterns.

Just for some context, this is is useful when you have multiple sites behind a proxy, but one of them needs to accept webhooks for example. In my specific setup, i am running geoblock on a https://coolify.io server, one of the features is automatic LetsEncrypt cert generation, but with geoblock enabled, it wont generate the certs and they dont have a list of hosts to exclude. Another site i am running, requires webhooks for whatsapp messages, again the provider doesnt specify their hosts so i would like to allow all traffic.

[PascalMinder]

Thanks for your contribution @taylorgibb. Could you only fix the following:

Error: geoblock.go:657:53: unused-parameter: parameter 'logger' seems to be unused, consider removing or renaming it as _ (revive) func compileExcludedPathPatterns(patterns []string, logger *log.Logger) ([]*regexp.Regexp, error) {

[taylorgibb]

@PascalMinder noted, will do this evening! Thanks for the review!

[taylorgibb]

Hi @PascalMinder i have pushed the change to remove the unused param and run the tests again, all looks good. Would you please take another look when you get a gap ?

[PascalMinder]

Thank you for your contribution. Looks good to me.