Drop nested location blocks from nginx vhost overrides — they 404 assets

The first version of vhost.d/<host>_location nested four `location { … }`
blocks (for /_astro/, images, /sw.js, /llms.txt) inside the proxy's
generated `location / { … }` to set Cache-Control. nginx accepts the
syntax, but a nested location with no `proxy_pass` directive falls through
to filesystem root and 404s the asset — which is why CSS / JS / images
were missing on the live site even though the HTML loaded fine.

Astro already emits sensible Cache-Control on hashed _astro bundles, so
we don't need the proxy to set them. Removed all four nested blocks; the
vhost.d files now only carry proxy headers, gzip, and security headers,
all of which are valid inside a location {} block without proxy_pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/nginx/vhost.d/nibiru-framework.com_location

@@ -1,20 +1,21 @@
 # =============================================================================
 #  nginx vhost-location override for nibiru-framework.com (apex)
 #
-#  Picked up by jwilder/nginx-proxy when this file is mounted into the proxy
-#  container at /etc/nginx/vhost.d/<host>_location.
+#  Picked up by jwilder/nginx-proxy when this file lives in the proxy's
+#  /etc/nginx/vhost.d/ at <host>_location. The contents are inlined inside
+#  the generated `location / { … }` block.
 #
-#  Pattern:
-#    -v /srv/nginx-proxy/vhost.d:/etc/nginx/vhost.d:ro
-#  on the proxy, then `cp docs/nginx/vhost.d/* /srv/nginx-proxy/vhost.d/`
-#  on the host (or symlink).
-#
-#  Each rule is scoped to the location { } block of the generated server,
-#  so we DON'T re-declare server, listen, server_name, ssl_*, etc.
+#  IMPORTANT: do NOT add nested `location { … }` blocks here. nginx allows
+#  the syntax, but a nested location with no `proxy_pass` falls through to
+#  filesystem root and 404s the asset. Earlier versions of this file did
+#  exactly that for /_astro/ + images + /sw.js, which is why CSS/JS/images
+#  weren't loading on the live site. Cache-Control for hashed bundles is
+#  already set by Astro itself; the proxy doesn't need to second-guess it.
 # =============================================================================
 
 # Trust the X-Forwarded-* headers nginx-proxy already sets, so the upstream
-# Astro server sees the real client IP and scheme.
+# Astro server sees the real client IP and scheme. (nginx-proxy sets these
+# in its default config too — restating here is belt-and-braces.)
 proxy_set_header X-Real-IP        $remote_addr;
 proxy_set_header X-Forwarded-For  $proxy_add_x_forwarded_for;
 proxy_set_header X-Forwarded-Host $host;
@@ -31,8 +32,7 @@ proxy_send_timeout       300s;
 proxy_set_header Upgrade    $http_upgrade;
 proxy_set_header Connection "upgrade";
 
-# Body size — large enough for the LoRA corpus uploads (cap is generous;
-# tighten if abuse becomes a concern).
+# Body size — generous; tighten if abuse becomes a concern.
 client_max_body_size 25m;
 
 # Compression — Astro emits text-heavy assets that gzip well.
@@ -61,29 +61,3 @@ add_header X-Content-Type-Options    "nosniff"             always;
 add_header X-Frame-Options           "SAMEORIGIN"          always;
 add_header Referrer-Policy           "strict-origin-when-cross-origin" always;
 add_header Permissions-Policy        "camera=(), microphone=(), geolocation=()" always;
-
-# Cache hashed Astro/Starlight assets aggressively (1 year, immutable).
-# The dev server hashes filenames via Vite, so cache-busting is automatic.
-location ~* ^/_astro/ {
-    expires 1y;
-    add_header Cache-Control "public, immutable, max-age=31536000";
-}
-
-# Static images / fonts / pwa manifest — long cache, mutable so a deploy
-# can invalidate by changing the file.
-location ~* \.(png|jpg|jpeg|gif|webp|avif|ico|svg|woff|woff2|ttf|otf)$ {
-    expires 30d;
-    add_header Cache-Control "public, max-age=2592000";
-}
-
-# Service worker MUST NOT be cached — needed for PWA updates to land.
-location = /sw.js {
-    expires off;
-    add_header Cache-Control "no-store, no-cache, must-revalidate";
-}
-
-# llms.txt is small; let it cache for a day so AI crawlers don't hammer it.
-location = /llms.txt {
-    expires 1d;
-    add_header Cache-Control "public, max-age=86400";
-}

docs/nginx/vhost.d/www.nibiru-framework.com_location

@@ -1,9 +1,13 @@
 # =============================================================================
 #  nginx vhost-location override for www.nibiru-framework.com
 #
-#  Same hardening + caching rules as the apex (nibiru-framework.com_location).
-#  Kept as a separate file so the proxy applies them per-vhost — the www and
-#  apex containers each get their own server block in the generated config.
+#  Same hardening + headers as the apex (nibiru-framework.com_location).
+#  Kept as a separate file so the proxy applies them per-vhost.
+#
+#  IMPORTANT: do NOT add nested `location { … }` blocks here. nginx allows
+#  the syntax, but a nested location with no `proxy_pass` falls through to
+#  filesystem root and 404s the asset. Astro already sets sane
+#  Cache-Control on hashed bundles; the proxy doesn't need to second-guess.
 #
 #  If you ever decide to redirect www → apex (SEO canonical-URL pattern)
 #  instead of serving from a second container, replace this file's contents
@@ -57,27 +61,3 @@ add_header X-Content-Type-Options    "nosniff"             always;
 add_header X-Frame-Options           "SAMEORIGIN"          always;
 add_header Referrer-Policy           "strict-origin-when-cross-origin" always;
 add_header Permissions-Policy        "camera=(), microphone=(), geolocation=()" always;
-
-# Hashed Astro/Starlight assets — 1 year, immutable.
-location ~* ^/_astro/ {
-    expires 1y;
-    add_header Cache-Control "public, immutable, max-age=31536000";
-}
-
-# Static images / fonts — 30 days.
-location ~* \.(png|jpg|jpeg|gif|webp|avif|ico|svg|woff|woff2|ttf|otf)$ {
-    expires 30d;
-    add_header Cache-Control "public, max-age=2592000";
-}
-
-# Service worker — never cache.
-location = /sw.js {
-    expires off;
-    add_header Cache-Control "no-store, no-cache, must-revalidate";
-}
-
-# llms.txt — short cache for AI crawlers.
-location = /llms.txt {
-    expires 1d;
-    add_header Cache-Control "public, max-age=86400";
-}