Update build.func

tweak

misc/build.func

@@ -340,11 +340,13 @@ advanced_settings() {
     echo -e "${DGN}Using Gateway IP Address: ${BGN}Default${CL}"
   fi
 
-  if APT_CACHER_IP=$(whiptail --backtitle "Proxmox VE Helper Scripts" --inputbox "Set APT-Cacher IP (leave blank for default)" 8 58 --title "APT-Cacher IP" 3>&1 1>&2 2>&3); then
-    APT_CACHER="${APT_CACHER_IP:+yes}"
-    echo -e "${DGN}Using APT-Cacher IP Address: ${BGN}${APT_CACHER_IP:-Default}${CL}"
-  else
-    exit-script
+  if [ "$var_os" != "alpine" ]; then
+    if APT_CACHER_IP=$(whiptail --backtitle "Proxmox VE Helper Scripts" --inputbox "Set APT-Cacher IP (leave blank for default)" 8 58 --title "APT-Cacher IP" 3>&1 1>&2 2>&3); then
+      APT_CACHER="${APT_CACHER_IP:+yes}"
+      echo -e "${DGN}Using APT-Cacher IP Address: ${BGN}${APT_CACHER_IP:-Default}${CL}"
+    else
+      exit-script
+    fi
   fi
 
   if (whiptail --backtitle "Proxmox VE Helper Scripts" --defaultno --title "IPv6" --yesno "Disable IPv6?" 10 58); then