Create new searx secret on install

src/freedombone-installer

@@ -754,6 +754,11 @@ function wait_for_enough_entropy {
     done
 }
 
+function create_random_string {
+    wait_for_enough_entropy
+    openssl rand -base64 32 | tr -dc A-Za-z0-9 | head -c "${1}" ; echo -n ''
+}
+
 function web_admin_create_user {
     username="$1"
     password="$2"
@@ -1155,6 +1160,11 @@ function after_setup_has_finished {
     web_admin_create_add_apps
     webadmin_update_version
 
+    # new searx secret
+    if [ -f "/etc/searx/searx/settings.yml" ]; then
+        sed -i "s|secret_key :.*|secret_key : \"$(create_random_string 30)\"|g" "/etc/searx/searx/settings.yml"
+    fi
+
     # remove default user
     if [ -d /home/fbone ]; then
         userdel -r fbone