update environment configuration, enhance setup guide, and align documentation with new domain structure

.env.example

@@ -12,7 +12,16 @@ R2_REGION=auto
 # Cloudflare (for custom domain, cache rules, Workers if used)
 CLOUDFLARE_API_TOKEN=your-cloudflare-api-token
 CLOUDFLARE_ACCOUNT_ID=your-account-id
-MEDIA_DOMAIN=media.example.com
+MEDIA_DOMAIN=media.linearvoid.tv
+
+# Public frontend URLs (Vite reads these from the repository root via frontend/vite.config.ts)
+# Local defaults keep development on localhost. Production should use:
+# VITE_PUBLIC_APP_URL=https://linearvoid.tv
+# VITE_PUBLIC_WS_URL=wss://linearvoid.tv/ws
+# VITE_PUBLIC_HLS_URL=https://media.linearvoid.tv/hls/playlist.m3u8
+VITE_PUBLIC_APP_URL=http://localhost:8080
+VITE_PUBLIC_WS_URL=ws://localhost:3000/ws
+VITE_PUBLIC_HLS_URL=http://localhost:8080/hls/playlist.m3u8
 
 # Gitea Container Registry (for self-hosted Docker images)
 GITEA_REGISTRY_URL=git.allucanget.biz
@@ -34,7 +43,7 @@ CHAT_PORT=3000
 NGINX_PORT=80
 
 # Playout configuration
-PLAYLIST_PATH=/app/playlist.txt
+PLAYLIST_PATH=/app/playlist/playlist.txt
 HLS_SEGMENT_DURATION=6
 HLS_WINDOW_SIZE=24