public/.htaccess

@@ -1,6 +1,14 @@
 # Enable rewrite engine
 RewriteEngine On
 
+# Security Headers
+<IfModule mod_headers.c>
+    Header set X-Content-Type-Options "nosniff"
+    Header set X-Frame-Options "SAMEORIGIN"
+    Header set Referrer-Policy "strict-origin-when-cross-origin"
+    Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; font-src 'self'; frame-src https://www.google.com/ https://www.google.de/; connect-src 'self'"
+</IfModule>
+
 # Legacy redirects (301) – must be before the catch-all
 RewriteRule ^impressum\.html$ /impressum [R=301,L]
 RewriteRule ^datenschutz\.html$ /datenschutz [R=301,L]