update environment configuration for local development, enhance database initialization, and improve Nginx routing for admin access

.env.example

@@ -15,13 +15,14 @@ CLOUDFLARE_ACCOUNT_ID=your-account-id
 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
+# Preferred local setup in this repo uses the real public domains through Cloudflare/Nginx Proxy Manager.
+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
+# Optional direct-local fallback when bypassing the public proxy:
+# VITE_PUBLIC_APP_URL=http://localhost
+# VITE_PUBLIC_WS_URL=ws://localhost/ws
+# VITE_PUBLIC_HLS_URL=http://localhost/hls/playlist.m3u8
 
 # Gitea Container Registry (for self-hosted Docker images)
 GITEA_REGISTRY_URL=git.allucanget.biz
@@ -29,13 +30,13 @@ GITEA_USERNAME=your-gitea-username
 GITEA_TOKEN=your-gitea-token
 GITEA_REGISTRY_NAMESPACE=zwitschi/linearvoid
 
-# Chat / Application Database (PostgreSQL or SQLite for local)
-DATABASE_URL=postgres://user:password@localhost:5432/linearvoid
-# Or for SQLite (local development):
+# Chat / Application Database (compose-safe PostgreSQL by default, SQLite optional)
+DATABASE_URL=postgres://linearvoid:linearvoid@db:5432/linearvoid?sslmode=disable
+# Or for SQLite-only local development:
 # DATABASE_URL=sqlite://./data/chat.db
 
 # Redis (for presence, rate limiting, pub/sub)
-REDIS_URL=redis://localhost:6379/0
+REDIS_URL=redis://redis:6379/0
 
 # Service Ports (for local docker-compose)
 PLAYOUT_PORT=8080