Fix systemd service startup issues

- Updated test-and-start.sh to work with systemd services
- Added proper node executable path detection
- Fixed issue with shebang line in startup script
- Updated service module to use absolute paths correctly
- Improved robustness of startup script with better error handling

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

modules/service-setup-module-updated.sh

@@ -82,9 +82,28 @@ if [ ! -f "$DATA_DIR/rss-items.json" ]; then
   echo "[]" > "$DATA_DIR/rss-items.json"
 fi
 
+# Find the node executable path
+NODE_PATH=$(which node 2>/dev/null)
+if [ -z "$NODE_PATH" ]; then
+  # If node is not in PATH, try common locations
+  for path in /usr/bin/node /usr/local/bin/node /opt/node/bin/node /usr/lib/node; do
+    if [ -x "$path" ]; then
+      NODE_PATH="$path"
+      break
+    fi
+  done
+
+  # If we still can't find node, use the default path
+  if [ -z "$NODE_PATH" ]; then
+    NODE_PATH="/usr/bin/node"
+    echo "Warning: Node.js not found in PATH, using default path: $NODE_PATH"
+  fi
+fi
+
 # Start the application
 cd "$APP_DIR" || { echo "Failed to change to application directory"; exit 1; }
-node server.js
+echo "Starting node.js application with: $NODE_PATH $APP_DIR/server.js"
+exec "$NODE_PATH" "$APP_DIR/server.js"
 EOF
 
   chmod +x "$TEST_START_SCRIPT"