Add optional URL rewrite config (.htaccess dan nginx.conf.example)

.htaccess

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+# Apache URL Rewrite untuk Retribusi Frontend
+# Opsional: Hanya diperlukan jika ingin clean URLs atau SPA routing
+
+# Enable rewrite engine
+<IfModule mod_rewrite.c>
+    RewriteEngine On
+    RewriteBase /
+
+    # Redirect trailing slash (optional)
+    RewriteCond %{REQUEST_FILENAME} !-d
+    RewriteRule ^(.*)/$ /$1 [R=301,L]
+
+    # Jika ingin clean URLs (tanpa .html), uncomment di bawah:
+    # RewriteCond %{REQUEST_FILENAME} !-f
+    # RewriteCond %{REQUEST_FILENAME} !-d
+    # RewriteRule ^dashboard$ public/dashboard/dashboard.html [L]
+    # RewriteRule ^event$ public/dashboard/event.html [L]
+    # RewriteRule ^settings$ public/dashboard/settings.html [L]
+
+    # Fallback untuk SPA (jika diperlukan di masa depan)
+    # RewriteCond %{REQUEST_FILENAME} !-f
+    # RewriteCond %{REQUEST_FILENAME} !-d
+    # RewriteRule ^(.*)$ index.php [QSA,L]
+</IfModule>
+
+# Security headers
+<IfModule mod_headers.c>
+    # Prevent clickjacking
+    Header set X-Frame-Options "SAMEORIGIN"
+    
+    # XSS Protection
+    Header set X-XSS-Protection "1; mode=block"
+    
+    # Content Type Options
+    Header set X-Content-Type-Options "nosniff"
+</IfModule>
+
+# CORS untuk development (jika diperlukan)
+# <IfModule mod_headers.c>
+#     Header set Access-Control-Allow-Origin "*"
+#     Header set Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS"
+#     Header set Access-Control-Allow-Headers "Content-Type, Authorization, X-API-KEY"
+# </IfModule>
+
+# Cache static assets
+<IfModule mod_expires.c>
+    ExpiresActive On
+    ExpiresByType text/css "access plus 1 year"
+    ExpiresByType application/javascript "access plus 1 year"
+    ExpiresByType image/png "access plus 1 year"
+    ExpiresByType image/jpg "access plus 1 year"
+    ExpiresByType image/jpeg "access plus 1 year"
+    ExpiresByType image/gif "access plus 1 year"
+    ExpiresByType image/svg+xml "access plus 1 year"
+</IfModule>
+
+# Gzip compression
+<IfModule mod_deflate.c>
+    AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript application/javascript application/json
+</IfModule>
+