speedtest-tracker: add external IP URL and internet check hostname in .env

[MickLesk]

✍️ Description

• add 2 new options to get speedtest to work
  [Feature] Better Feedback if cURL not possible (Speedtests fail when public IP check is blocked (e.g. AdGuard Home / DNS filtering)) alexjustesen/speedtest-tracker#2525 (comment)

🔗 Related Issue

Fixes #10415

✅ Prerequisites (X in brackets)

• Self-review completed – Code follows project standards.
• Tested thoroughly – Changes work as expected.
• No security risks – No hardcoded secrets, unnecessary privilege escalations, or permission issues.

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🛠️ Type of Change (X in brackets)

• 🐞 Bug fix – Resolves an issue without breaking functionality.
• ✨ New feature – Adds new, non-breaking functionality.
• 💥 Breaking change – Alters existing functionality in a way that may require updates.
• 🆕 New script – A fully functional and tested script or script set.
• 🌍 Website update – Changes to website-related JSON files or metadata.
• 🔧 Refactoring / Code Cleanup – Improves readability or maintainability without changing functionality.
• 📝 Documentation update – Changes to README, AppName.md, CONTRIBUTING.md, or other docs.

[MickLesk]

testing...

[Dunky13]

Adding these env variables to /opt/speedtest-tracker/.env did not resolve the issue for me. Settings were applied

[MickLesk]

Yeah i know, thats the reason for Draft.

[CrazyWolf13]

Possibly we can add this as well @MickLesk

# Fix Ping issues: https://github.com/alexjustesen/speedtest-tracker/issues/2525#issuecomment-3677992174
setcap cap_net_raw+p /bin/ping

At least for me this solved some of the issues.

[CrazyWolf13]

maybe we should consider using https://ip.me when using curl ip.me this also just returns the public IP, and I've been using this for years, the adress https://ipecho.net/plain is also in the same hazegi dns blocklist as the initial domain used by speedtest-tracker by default, so this does not add any value in that regard

[MickLesk]

Doesnt Work too 😂

[CrazyWolf13]

for me it does :D
What dns blocklist blocks it?

[drVLecter]

For me none of the changes in env file worked.

What did work is following command/s within the speedtracker lxc:

setcap cap_net_raw+ep /bin/ping && 
sudo -u www-data ping -c 1 icanhazip.com && 
systemctl restart speedtest-tracker

This worked on both old working but broken after update lxc or a new up-to-date lxc that didnt work out of the box.