Add Docker setup: nginx frontend + backend compose

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.env.example

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+# Copy to .env and fill in your values
+
+MUSIC_PATH=/path/to/your/navidrome/music
+
+AUDIO_FMT=mp3          # mp3 | flac | opus | best
+AUDIO_QUALITY=0        # 0 = best quality
+MAX_PARALLEL=2
+
+NAVIDROME_URL=http://navidrome:4533
+NAVIDROME_USER=admin
+NAVIDROME_PASS=yourpassword

Dockerfile

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+FROM nginx:alpine
+COPY index.html styles.css app.js sw.js /usr/share/nginx/html/
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+EXPOSE 80

docker-compose.yml

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+services:
+
+  # ── Frontend (nginx) ──────────────────────────────────────────────────────────
+  novasonic-frontend:
+    build: .
+    container_name: novasonic-frontend
+    restart: unless-stopped
+    ports:
+      - "8080:80"          # change left side to your desired host port
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.novasonic.rule=Host(`novasonic.yourdomain.com`)"
+      - "traefik.http.routers.novasonic.entrypoints=websecure"
+      - "traefik.http.routers.novasonic.tls.certresolver=letsencrypt"
+
+  # ── Backend (yt-dlp download server) ─────────────────────────────────────────
+  novasonic-backend:
+    image: node:20-alpine
+    container_name: novasonic-backend
+    restart: unless-stopped
+    working_dir: /app
+    volumes:
+      - ./backend/novasonic-server.js:/app/novasonic-server.js:ro
+      - ${MUSIC_PATH:-/music}:/music   # your Navidrome music library
+    ports:
+      - "3700:3700"
+    environment:
+      - PORT=3700
+      - MUSIC_PATH=/music
+      - AUDIO_FMT=${AUDIO_FMT:-mp3}
+      - AUDIO_QUALITY=${AUDIO_QUALITY:-0}
+      - MAX_PARALLEL=${MAX_PARALLEL:-2}
+      - NAVIDROME_URL=${NAVIDROME_URL:-}
+      - NAVIDROME_USER=${NAVIDROME_USER:-}
+      - NAVIDROME_PASS=${NAVIDROME_PASS:-}
+    command: >
+      sh -c "
+        apk add --no-cache yt-dlp ffmpeg python3 &&
+        npm install express cors &&
+        node novasonic-server.js
+      "
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.novasonic-api.rule=Host(`novasonic-api.yourdomain.com`)"
+      - "traefik.http.routers.novasonic-api.entrypoints=websecure"
+      - "traefik.http.routers.novasonic-api.tls.certresolver=letsencrypt"

nginx.conf

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+server {
+    listen 80;
+    server_name _;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    gzip on;
+    gzip_types text/css application/javascript application/json image/svg+xml;
+    gzip_min_length 1024;
+
+    # index.html – never cache so SW updates are picked up immediately
+    location = /index.html {
+        add_header Cache-Control "no-cache, no-store, must-revalidate";
+    }
+
+    # Static assets – long-term cache (cache busted by SW version)
+    location ~* \.(css|js)$ {
+        add_header Cache-Control "public, max-age=31536000, immutable";
+    }
+
+    # Service worker – no cache so browser always gets the latest version
+    location = /sw.js {
+        add_header Cache-Control "no-cache, no-store, must-revalidate";
+        add_header Service-Worker-Allowed "/";
+    }
+
+    # SPA fallback
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}