Add ice-proxy example

[amanakin]

Description

This PR introduces an example demonstrating how to configure and use a proxy with ICE.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.53%. Comparing base (f5d98ce) to head (919a236).
Report is 8 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3165      +/-   ##
==========================================
+ Coverage   78.53%   80.53%   +2.00%     
==========================================
  Files          91       78      -13     
  Lines       11496    10552     -944     
==========================================
- Hits         9028     8498     -530     
+ Misses       1971     1606     -365     
+ Partials      497      448      -49     

Flag	Coverage Δ
go	80.53% <ø> (+0.14%)	⬆️
wasm	?

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[Sean-Der]

Great work @amanakin I would love to merge this!

What is the purpose of TURN in the example? I don't understand the relationship of HTTP Proxying + TURN.

Is it possible to do proxying using ice-tcp instead? Is TCP via TURN a requirement?

[amanakin]

Great work @amanakin I would love to merge this!

What is the purpose of TURN in the example? I don't understand the relationship of HTTP Proxying + TURN.

Is it possible to do proxying using ice-tcp instead? Is TCP via TURN a requirement?

Hey, yes, proxying is currently possible (and it makes sense) only via turn
https://github.com/pion/ice/blame/master/gather.go#L706

[amanakin]

@Sean-Der
I also want to update this example by using just two Pion clients, because the Chrome browser doesn't allow TURN requests to localhost. Maybe this is because of: https://localmess.github.io/ (By the way, in Firefox it works.)

[Sean-Der]

@amanakin that would be great! Will make it significantly simpler.

also love the in-server TURN example. I think it will be real useful :)

[amanakin]

@Sean-Der, I updated the example and added some clarifications to the readme.