Sina

Change ifconfig.co to ipv6-test

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**⚠️ Unless you are sure you find a bug with the script, please open a [discussion](https://github.com/angristan/openvpn-install/discussions) instead of an issue!** **Checklist** - [x] I read the [README](https://github.com/angristan/openvpn-install/blob/master/README.md) - [x] I...

The https://ifconfig.co block some countries (eg. Iran) by Cloudflare and when you run the `curl ifconfig.co`, you will be getting `error code: 1020` I replace the ifconfig.co with ipv6-test to...

Add Dockerfile and update README.md (Please add hacktoberfest label to this PR, and if you want to merge it, please add hacktoberfest-accepted and hacktoberfest labels)

Enable leader-election by default for autoneg controller

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This PR enables leader-election by default to ensure high availability and prevent multiple controller instances from conflicting with each other in production environments. * Improves reliability in multi-replica deployments