Fix CORS configuration for PWA offline caching

- Add CORS_ALLOWED_ORIGINS environment variable support in Django settings
- Update docker-compose.yml to include CORS origins (HTTP, HTTPS, custom domain)
- Add comprehensive PWA offline debugging guide

docker-compose.yml

@@ -4,11 +4,11 @@ services:
   soundwave:
     container_name: soundwave
     # Option 1: Pull from GitHub Container Registry (recommended for users)
-    #image: ghcr.io/aiulian25/soundwave:latest
+    # image: ghcr.io/aiulian25/soundwave:main
     # Option 2: Build locally (uncomment if pulling fails or for development)
-     build:
-       context: .
-       dockerfile: Dockerfile
+    build:
+      context: .
+      dockerfile: Dockerfile
     ports:
       - "8889:8888"
     volumes:
@@ -24,6 +24,7 @@ services:
       - REDIS_HOST=soundwave-redis
       - TZ=UTC
       - ES_URL=http://soundwave-es:9200
+      - CORS_ALLOWED_ORIGINS=http://localhost:8889,https://localhost:8889,https://sound.iulian.uk
     depends_on:
       - soundwave-es
       - soundwave-redis