fix(fileflows): use fileflows.com header for node version check

Replace GitHub API call (repo does not exist) with a HEAD request
to the fileflows.com download URL. The Content-Disposition header
contains the versioned filename, from which the release number is
parsed and compared against the local version file.

If the header is not available the node update proceeds unconditionally,
since the user explicitly invoked the update command.

ct/fileflows.sh

@@ -31,11 +31,22 @@ function update_script() {
     exit
   fi
 
-  update_available=$(curl -fsSL -X 'GET' "http://localhost:19200/api/status/update-available" -H 'accept: application/json' | jq .UpdateAvailable)
-  if [[ "${update_available}" == "true" ]]; then
+  CURRENT=$(cat /opt/fileflows/version 2>/dev/null | tr -d '[:space:]')
+  # Extract latest version from the Content-Disposition header of the download URL
+  RELEASE=$(curl -fsI "https://fileflows.com/downloads/zip" 2>/dev/null \
+    | grep -i "content-disposition" \
+    | grep -oP '[\d]+\.[\d]+\.[\d]+\.[\d]+' \
+    | head -1)
+
+  if systemctl is-enabled fileflows-node &>/dev/null && ! systemctl is-enabled fileflows &>/dev/null; then
+    # Node-only installation: no local server API available
+    if [[ -n "$RELEASE" && "$CURRENT" == "$RELEASE" ]]; then
+      msg_ok "No update required. ${APP} Node is already at v${CURRENT}"
+      exit
+    fi
     msg_info "Stopping Service"
-    systemctl stop fileflows*
-    msg_info "Stopped Service"
+    systemctl stop fileflows-node
+    msg_ok "Stopped Service"
 
     msg_info "Creating Backup"
     ls /opt/*.tar.gz &>/dev/null && rm -f /opt/*.tar.gz
@@ -46,11 +57,32 @@ function update_script() {
     fetch_and_deploy_from_url "https://fileflows.com/downloads/zip" "/opt/fileflows"
 
     msg_info "Starting Service"
-    systemctl start fileflows*
+    systemctl start fileflows-node
     msg_ok "Started Service"
     msg_ok "Updated successfully!"
   else
-    msg_ok "No update required. ${APP} is already at latest version"
+    # Server installation: use the local API
+    update_available=$(curl -fsSL -X 'GET' "http://localhost:19200/api/status/update-available" -H 'accept: application/json' | jq .UpdateAvailable)
+    if [[ "${update_available}" == "true" ]]; then
+      msg_info "Stopping Service"
+      systemctl stop fileflows*
+      msg_ok "Stopped Service"
+
+      msg_info "Creating Backup"
+      ls /opt/*.tar.gz &>/dev/null && rm -f /opt/*.tar.gz
+      backup_filename="/opt/${APP}_backup_$(date +%F).tar.gz"
+      tar -czf "$backup_filename" -C /opt/fileflows Data
+      msg_ok "Backup Created"
+
+      fetch_and_deploy_from_url "https://fileflows.com/downloads/zip" "/opt/fileflows"
+
+      msg_info "Starting Service"
+      systemctl start fileflows*
+      msg_ok "Started Service"
+      msg_ok "Updated successfully!"
+    else
+      msg_ok "No update required. ${APP} is already at latest version"
+    fi
   fi
 
   exit