Cache control

src/freedombone-app-cryptpad

     echo '' >> $cryptpad_nginx_site
     echo '  index index.html;' >> $cryptpad_nginx_site
     echo '' >> $cryptpad_nginx_site
+    echo '  if ($args ~ ver=) {' >> $cryptpad_nginx_site
+    echo '      set $cacheControl max-age=31536000;' >> $cryptpad_nginx_site
+    echo '  }' >> $cryptpad_nginx_site
+    echo '  add_header Cache-Control $cacheControl;' >> $cryptpad_nginx_site
+    echo '' >> $cryptpad_nginx_site
     echo '  add_header X-XSS-Protection "1; mode=block";' >> $cryptpad_nginx_site
     echo '  add_header X-Content-Type-Options nosniff;' >> $cryptpad_nginx_site
     echo '  add_header X-Frame-Options SAMEORIGIN;' >> $cryptpad_nginx_site