fix non images always show notifications, add override domain, fix headers

helpers/config.sh

@@ -123,6 +123,24 @@ setup_domain() {
         done
 
         if [[ "$change_options" =~ ^(y|Y)$ ]]; then
+            while true; do
+                echo -ne "${CYAN}Enter override domain for accessing files (e.g. random.domain.com): ${RESET}"
+                read override_domain
+
+                if [[ -z "$override_domain" ]]; then
+                    echo -e "${YELLOW}No override domain set.${RESET}"
+                    break
+                fi
+
+                if [[ "$override_domain" =~ ^[a-zA-Z0-9.-]+$ ]]; then
+                    set_value "x-zipline-domain" "$override_domain"
+                    echo -e "${GREEN}x-zipline-domain set to: $override_domain${RESET}"
+                    break
+                else
+                    echo -e "${YELLOW}Invalid format. Must be like: domain.tld (no https, no trailing slash). Try again or press Enter to skip.${RESET}"
+                fi
+            done
+
             echo -ne "${CYAN}Enter the number of max views (default: 0): ${RESET}"
             read max_views
             while [[ -n "$max_views" && ! "$max_views" =~ ^[0-9]+$ ]]; do

helpers/variables.sh

@@ -25,6 +25,7 @@ declare -A ALLOWED_KEYS=(
     ["x-zipline-image-compression-percent"]="^.+$"
     ["x-zipline-original-name"]="^.+$"
     ["x-zipline-format"]="^.+$"
+    ["x-zipline-domain"]="^.+$"
 )
 
 REQUIRED_KEYS=(