Update source.sh

- Fix `hb-service` not working from Homebridge UI when using Synology Node.JS-v18 package.
- Revert to bundled NodeJS version, when removing Node.JS-v18 package.

app/source.sh

@@ -1,17 +1,15 @@
 #!/bin/sh
 
-
-
 export HB_SERVICE_STORAGE_PATH="$(readlink -f /var/packages/homebridge/shares/homebridge)"
+NODE_BIN_PATH="/var/packages/homebridge/target/app/bin"
 
 # Use Synology supplied NodeJS v18 - https://github.com/homebridge/homebridge-syno-spk/issues/124
-# if [ -f /var/packages/Node.js_v18/target/usr/local/bin/node ]; then
-NODE_BIN_PATH="/var/packages/Node.js_v18/target/usr/local/bin"
-export HB_SERVICE_NODE_EXEC_PATH="/var/packages/Node.js_v18/target/usr/local/bin/node"
-# else
-#  NODE_BIN_PATH="/var/packages/homebridge/target/app/bin"
-#  export HB_SERVICE_NODE_EXEC_PATH="/var/packages/homebridge/target/app/bin/node"
-#fi
+if [ -f /var/packages/Node.js_v18/target/usr/local/bin/node ]; then
+  NODE_BIN_PATH="/var/packages/Node.js_v18/target/usr/local/bin:$NODE_BIN_PATH"
+  export HB_SERVICE_NODE_EXEC_PATH="/var/packages/Node.js_v18/target/usr/local/bin/node"
+else
+  export HB_SERVICE_NODE_EXEC_PATH="/var/packages/homebridge/target/app/bin/node"
+fi
 
 export HB_SERVICE_EXEC_PATH="/var/packages/homebridge/target/app/lib/node_modules/homebridge-config-ui-x/dist/bin/hb-service.js"