feat: migrate voice app, add otel/rum, dockerfile, k8s deployment with ingress

README.md

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+# gibbz voice — POC
+
+Discord-clone proof of concept: peer-to-peer WebRTC voice chat + screen sharing
+with position-based spatial audio and pluggable STUN/TURN.
+
+Run (Node 18+, only dep is `ws`):
+
+```sh
+npm install
+PORT=8081 npm start
+# open http://localhost:8081, click a voice channel, allow mic
+```
+
+## What works
+
+- Mesh WebRTC voice (perfect negotiation; lowest peer id initiates)
+- Screen share with audio (mic is spatialized, screen audio plays direct)
+- Spatial audio: drag your avatar on the plane; remote mics run through a
+  `PannerNode` (HRTF, inverse distance). Positions sync over signaling.
+- Custom STUN/TURN: gear icon → JSON override in `localStorage`, applied on
+  next join. Server default comes from env (below).
+- Mute (M), deafen (D), per-peer volume, speaking indicators.
+
+## ICE configuration (server side)
+
+| Env var | Meaning |
+|---|---|
+| `STUN_URLS` | comma-separated `stun:` urls (Google defaults) |
+| `TURN_URLS` | comma-separated `turn:`/`turns:` urls |
+| `TURN_USERNAME` / `TURN_CREDENTIAL` | static TURN creds |
+| `ICE_SERVERS_JSON` | full `{"iceServers":[...]}` override, wins over the above |
+| `PORT` / `HOST` | listen address (default 8081 / 0.0.0.0) |
+
+Example with coturn:
+
+```sh
+TURN_URLS='turn:turn.example.com:3478?transport=udp,turns:turn.example.com:5349' \
+TURN_USERNAME=mats TURN_CREDENTIAL=secret npm start
+```
+
+## POC shortcuts (productionize later)
+
+- No auth, no reconnection, rooms are in-memory, signaling is unencrypted ws
+  behind the preview ingress (use wss/TLS in front for real deploys).
+- No media server: N² mesh — fine for small rooms, needs SFU (mediasoup/livekit)
+  beyond ~6–8 participants.
+- Text channels are decorative. No persistence, no rate limiting.
+- Screen-share negotiation storms on join/leave are expected at small scale.