Add .htaccess for origin hardening, HTTPS redirect, and cache headers

public/.htaccess

@@ -0,0 +1,55 @@
+# ---------------------------------------------------------------
+# www.cameleer.io — Apache config at the Hetzner origin.
+# Defense in depth: Cloudflare handles most of this at the edge;
+# these rules make sure the origin is hardened even without the CDN.
+# ---------------------------------------------------------------
+
+# Enable rewriting
+RewriteEngine On
+
+# Force HTTPS — redundant with Cloudflare but belts-and-braces.
+RewriteCond %{HTTPS} !=on
+RewriteCond %{HTTP:X-Forwarded-Proto} !=https
+RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
+
+# Redirect apex -> www.
+RewriteCond %{HTTP_HOST} ^cameleer\.io$ [NC]
+RewriteRule ^(.*)$ https://www.cameleer.io/$1 [L,R=301]
+
+# Disable directory listings.
+Options -Indexes
+
+# Block access to dotfiles and sensitive extensions that should never be here.
+<FilesMatch "^\.|\.(env|ini|log|sh|bak|sql|git)$">
+    Require all denied
+</FilesMatch>
+
+# Prevent MIME sniffing, clickjacking, etc. (primary copy also comes from Astro middleware
+# and Cloudflare Transform Rules — these apply if either layer is bypassed).
+<IfModule mod_headers.c>
+    Header always set X-Content-Type-Options "nosniff"
+    Header always set X-Frame-Options "DENY"
+    Header always set Referrer-Policy "strict-origin-when-cross-origin"
+    Header always set Permissions-Policy "geolocation=(), microphone=(), camera=(), payment=(), usb=()"
+    Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
+
+    # Cache hashed build assets aggressively; HTML must be revalidated.
+    <FilesMatch "\.(css|js|woff2|svg|png|jpg|jpeg|webp|ico)$">
+        Header set Cache-Control "public, max-age=31536000, immutable"
+    </FilesMatch>
+    <FilesMatch "\.html$">
+        Header set Cache-Control "public, max-age=3600, must-revalidate"
+    </FilesMatch>
+
+    # Remove Server header leak where possible.
+    Header unset X-Powered-By
+</IfModule>
+
+# Compression (Hetzner supports mod_deflate).
+<IfModule mod_deflate.c>
+    AddOutputFilterByType DEFLATE text/html text/css application/javascript application/json image/svg+xml text/plain
+</IfModule>
+
+# Custom error pages (optional — fall back to default if not present).
+ErrorDocument 404 /404.html
+ErrorDocument 403 /404.html