feat: update site URLs and enhance image handling

- Changed site URLs in docker-compose and deployment configurations to remove "www" prefix for consistency.
- Improved image handling by introducing warmPostCardImages function for pre-fetching images in posts and tags.
- Enhanced PostCard component with responsive image sizes for better performance.
- Updated layout to include robots meta tag and JSON-LD structured data for improved SEO.
- Added loading state for images in TopBanner component to enhance user experience.

docker-compose.yml

@@ -5,9 +5,9 @@ services:
       - "3001:3001"
     environment:
       - PUBLIC_CMS_URL=${PUBLIC_CMS_URL:-http://rustycms:3000}
-      - PUBLIC_SITE_URL=${PUBLIC_SITE_URL:-https://www.windwiderstand.de}
+      - PUBLIC_SITE_URL=${PUBLIC_SITE_URL:-https://windwiderstand.de}
       - PUBLIC_SITE_NAME=${PUBLIC_SITE_NAME:-Windwiderstand}
-      - ORIGIN=${ORIGIN:-https://www.windwiderstand.de}
+      - ORIGIN=${ORIGIN:-https://windwiderstand.de}
       - IMAGE_CACHE_DIR=${IMAGE_CACHE_DIR:-/app/.cache/images}
     volumes:
       - image-cache:/app/.cache/images