Add .env.example

.env.example

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+# Telegram
+TELEGRAM_BOT_TOKEN=your_telegram_bot_token_here
+
+# Spotify app credentials
+SPOTIFY_CLIENT_ID=your_spotify_client_id
+SPOTIFY_CLIENT_SECRET=your_spotify_client_secret
+SPOTIFY_REDIRECT_URI=http://localhost:8000/auth/spotify/callback
+SPOTIFY_DEFAULT_MARKET=NL
+
+# Optional: improves recommendation quality
+LASTFM_API_KEY=
+
+# App / API
+APP_ENV=dev
+APP_BASE_URL=http://localhost:8000
+APP_INTERNAL_URL=http://app:8000
+APP_PORT=8000
+APP_TIMEZONE=UTC
+TZ=UTC
+
+# Internal auth (used by optional cron -> internal endpoint)
+INTERNAL_JOB_TOKEN=change-me-to-a-random-secret
+
+# Storage
+DB_PATH=/data/app.db
+
+# Recommendation defaults
+DEFAULT_PLAYLIST_SIZE=30
+MIN_NEW_RATIO=0.8
+RECENT_DAYS_WINDOW=5
+PLAYLIST_VISIBILITY=private
+
+# Optional cron (only if you start the cron profile)
+CRON_SCHEDULE=15 2 * * *
+
+# Optional Traefik label host (used by docker-compose labels)
+TRAEFIK_HOSTNAME=spotify-vibe.example.com