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

logrotate-docfast

@@ -1,13 +1,13 @@
-/var/log/docfast*.log {
-    weekly
-    rotate 4
+/var/log/docfast/*.log {
+    daily
+    rotate 7
     compress
     delaycompress
     missingok
     notifempty
     create 644 root root
     postrotate
-        # Send USR1 signal to dockerized apps to reopen log files
-        /bin/kill -USR1 $(cat /var/run/docker.pid 2>/dev/null) 2>/dev/null || true
+        # Restart docker container to reopen log files
+        docker restart docfast-docfast-1 >/dev/null 2>&1 || true
     endscript
 }