Add base URL rewrite rules and secure petition data files

Add base URL rewrite rules for app routing
Secure petition data files with access restrictions

content/.htaccess.base

@@ -0,0 +1,14 @@
+DirectorySlash Off
+
+<IfModule mod_rewrite.c>
+    RewriteEngine On
+    RewriteBase /
+
+    # Route /app requests to index.php
+    RewriteCond %{REQUEST_URI} ^/app/
+    RewriteRule ^(.*)$ /index.php [L,QSA]
+
+    # Don't rewrite if file exists
+    RewriteCond %{REQUEST_FILENAME} !-f
+    RewriteRule ^(.*)$ /index.php [L,QSA]
+</IfModule>

custom/data/petitions/.htaccess

@@ -0,0 +1,7 @@
+# Deny access to petition data files
+<FilesMatch "\.csv$">
+    Require all denied
+</FilesMatch>
+
+# Also deny directory listing
+Options -Indexes