Reduce FPM workers from 12 to 5 max to stop memory thrashing on
a single-core VPS with 3GB RAM. Add OPcache and APCu tuning to
reduce filesystem stat calls and improve cache hit rates.
Static file locations now return 404 instead of falling through to
index.php, and the default location uses a clean rewrite to prevent
/index.php/index.php redirect cycles.
Increase PHP-FPM max_children from 5 to 12 to handle concurrent
requests without queuing, sized for a ~3GB VPS. Add Mermaid
architecture diagram to README.
Replace the all-in-one Apache image with nextcloud:33-fpm and an Nginx
sidecar that serves static assets directly with gzip compression and
cache headers, avoiding the prefork concurrency bottleneck.
