feat: high-quality video/audio defaults for Sunbeam

- VP9 @ 1080p/8Mbps/30fps (was VP8 720p/1.7Mbps)
- 320kbps stereo Opus audio (was 48kbps mono)
- Screen share @ 1080p/60fps/8Mbps (was 30fps/5Mbps)
- VP9 SVC replaces simulcast (single stream with embedded layers)
- Auto VP8 fallback for incompatible clients

Dockerfile.sunbeam

@@ -0,0 +1,17 @@
+FROM --platform=$BUILDPLATFORM node:24-alpine AS build
+
+WORKDIR /app
+COPY package.json yarn.lock .yarnrc.yml ./
+COPY .yarn .yarn
+RUN corepack enable && yarn install --immutable
+
+COPY . .
+RUN yarn build:full
+
+# Compress assets for nginx gzip_static
+WORKDIR /app/dist/assets
+RUN gzip -k ../index.html *.js *.map *.css *.wasm *-app-*.json 2>/dev/null || true
+
+FROM nginxinc/nginx-unprivileged:alpine-slim
+COPY --from=build /app/dist /app
+COPY config/nginx.conf /etc/nginx/conf.d/default.conf

src/livekit/options.ts

@@ -6,29 +6,28 @@ Please see LICENSE in the repository root for full details.
 */
 
 import {
-  AudioPresets,
   DefaultReconnectPolicy,
   type RoomOptions,
-  ScreenSharePresets,
   type TrackPublishDefaults,
-  type VideoPreset,
+  VideoPreset,
   VideoPresets,
 } from "livekit-client";
 
 const defaultLiveKitPublishOptions: TrackPublishDefaults = {
-  audioPreset: AudioPresets.music,
-  dtx: true,
+  audioPreset: { maxBitrate: 320_000 },
+  dtx: false,
   // disable red because the livekit server strips out red packets for clients
   // that don't support it (firefox) but of course that doesn't work with e2ee.
   red: false,
-  forceStereo: false,
-  simulcast: true,
-  videoSimulcastLayers: [VideoPresets.h180, VideoPresets.h360] as VideoPreset[],
-  screenShareEncoding: ScreenSharePresets.h1080fps30.encoding,
+  forceStereo: true,
+  // VP9 SVC replaces simulcast — one stream with embedded spatial/temporal layers.
+  simulcast: false,
+  screenShareEncoding: new VideoPreset(1920, 1080, 8_000_000, 60, "medium")
+    .encoding,
   stopMicTrackOnMute: false,
-  videoCodec: "vp8",
-  videoEncoding: VideoPresets.h720.encoding,
-  backupCodec: { codec: "vp8", encoding: VideoPresets.h720.encoding },
+  videoCodec: "vp9",
+  videoEncoding: { maxBitrate: 8_000_000, maxFramerate: 30 },
+  backupCodec: true,
 } as const;
 
 export const defaultLiveKitOptions: RoomOptions = {
@@ -40,7 +39,7 @@ export const defaultLiveKitOptions: RoomOptions = {
 
   // capture settings
   videoCaptureDefaults: {
-    resolution: VideoPresets.h720.resolution,
+    resolution: VideoPresets.h1080.resolution,
   },
 
   // publish settings