feat: add persistent Koel configuration via environment variables

- Add MEDIA_PATH, STORAGE_DRIVER, TRUSTED_PROXIES, and FORCE_HTTPS to environment
- Apply settings to both koel and koel_init containers
- Ensures configuration persists across container restarts without manual intervention

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

media/compose.yaml

@@ -89,6 +89,12 @@ services:
       DB_PASSWORD: ${DB_PASSWORD}
       MEMORY_LIMIT: ${MEDIA_KOEL_MEMORY_LIMIT:-512M}
       STREAMING_METHOD: ${MEDIA_KOEL_STREAMING_METHOD:-x-sendfile}
+      # Media and storage configuration
+      MEDIA_PATH: /music
+      STORAGE_DRIVER: local
+      # Proxy configuration
+      TRUSTED_PROXIES: '*'
+      FORCE_HTTPS: 'true'
     networks:
       - compose_network
     labels:
@@ -133,6 +139,12 @@ services:
       DB_DATABASE: ${MEDIA_KOEL_DB_NAME}
       DB_USERNAME: ${DB_USER}
       DB_PASSWORD: ${DB_PASSWORD}
+      # Media and storage configuration
+      MEDIA_PATH: /music
+      STORAGE_DRIVER: local
+      # Proxy configuration
+      TRUSTED_PROXIES: '*'
+      FORCE_HTTPS: 'true'
     networks:
       - compose_network