initial

infra/livekit/README.md

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+# LiveKit — local dev
+
+Self-hosted SFU for voice + video. Runs in Docker on host-network mode so
+WebRTC UDP ports work natively.
+
+## Start / Stop
+
+```bash
+# from repo root
+docker compose -f infra/livekit/docker-compose.yml up -d
+docker compose -f infra/livekit/docker-compose.yml logs -f livekit
+docker compose -f infra/livekit/docker-compose.yml down
+```
+
+## Endpoints
+
+| Purpose       | URL / Port            |
+|---------------|-----------------------|
+| Signaling WS  | `ws://localhost:7880` |
+| TCP fallback  | `tcp://localhost:7881`|
+| UDP RTC       | `50000-50100/udp`     |
+| coturn        | `3478/udp+tcp`        |
+
+## Dev keys
+
+Baked into `livekit.yaml`:
+
+- `LIVEKIT_API_KEY=devkey`
+- `LIVEKIT_API_SECRET=devsecret-at-least-32-bytes-long-please`
+- `LIVEKIT_URL=ws://localhost:7880`
+
+Same values go into `apps/desktop/.env` (via `VITE_LIVEKIT_URL`) and into the
+edge function's `supabase/functions/.env`.
+
+## Prod (later)
+
+Same image on the Hetzner VPS. Caddy terminates TLS at
+`wss://livekit.netralax.cloud`. coturn exposed on `turn.netralax.cloud:5349`
+(TURNS). Secrets generated via `openssl rand -hex 32` and stored in the server
+env + Supabase edge secrets.

infra/livekit/docker-compose.yml

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+# Local LiveKit SFU for M2 dev.
+#
+# macOS + Docker Desktop: `network_mode: host` is NOT supported — falls back
+# to explicit port mapping. WebRTC UDP ports are ranged small for dev.
+#
+# Start:   docker compose -f infra/livekit/docker-compose.yml up -d
+# Stop:    docker compose -f infra/livekit/docker-compose.yml down
+# Logs:    docker compose -f infra/livekit/docker-compose.yml logs -f livekit
+
+services:
+  livekit:
+    image: livekit/livekit-server:latest
+    restart: unless-stopped
+    command: ["--config", "/etc/livekit.yaml"]
+    ports:
+      - "7880:7880/tcp" # signaling WS
+      - "7881:7881/tcp" # RTC TCP fallback
+      - "50000-50100:50000-50100/udp" # RTC UDP range
+    volumes:
+      - ./livekit.yaml:/etc/livekit.yaml:ro
+
+  turn:
+    image: coturn/coturn:4.6
+    restart: unless-stopped
+    ports:
+      - "3478:3478/udp"
+      - "3478:3478/tcp"
+      - "50200-50300:50200-50300/udp"
+    command: >
+      -n
+      --log-file=stdout
+      --min-port=50200
+      --max-port=50300
+      --no-cli
+      --no-tls
+      --no-dtls
+      --realm=local.chatapp
+      --lt-cred-mech
+      --user=dev:devpassword
+      --no-multicast-peers

infra/livekit/livekit.yaml

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+# LiveKit dev config. Keys must match what the `mint-livekit-token` edge
+# function signs. NEVER reuse these in prod — they're shared publicly here
+# only because this is a dev container on localhost.
+
+port: 7880
+log_level: info
+
+rtc:
+  tcp_port: 7881
+  port_range_start: 50000
+  port_range_end: 50100
+  use_external_ip: false
+  # For dev on macOS + Docker Desktop the host-networking mode maps UDP
+  # directly, so announce 127.0.0.1 so the client connects back to the
+  # loopback interface instead of the container IP.
+  node_ip: 127.0.0.1
+
+# Dev credentials.
+keys:
+  devkey: devsecret-at-least-32-bytes-long-please
+
+# Built-in STUN. We run coturn alongside anyway for the realistic flow.
+turn:
+  enabled: false