Nginx is closer to the origin, so compressing there avoids an
extra hop. Removes the Caddy encode block for Nextcloud and adds
gzip in nginx with level 4 targeting text, CSS, JS, JSON, XML, SVG.
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.
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.
