Fix: nginx duplicate MIME type, update version to 0.2.1, improve log rotation

- Remove duplicate text/html from nginx gzip_types (fixes nginx -t warning)
- Update hardcoded API version from 0.2.0 to 0.2.1 to match package.json
- Update logrotate config: daily rotation, 7 days retention, improved postrotate
- Add Docker logging configuration with size/file limits

docker-compose.yml

@@ -26,6 +26,11 @@ services:
       - PAGES_PER_BROWSER=15
     volumes:
       - docfast-data:/app/data
+    logging:
+      driver: "json-file"
+      options:
+        max-size: "10m"
+        max-file: "3"
     mem_limit: 2560m
     cpus: 1.5