Help me with my AWS Lightsail Node.JS Node.RED program

I have a Node.Red program monitoring my LiFEPO4 battery BMS via MQTT running on an AWS Lightsail Node.JS environment. I want a bit of help with the flow to fix some bugs. I also want to password protect my app , and also update my AWS Lightsail (Bitnami ?) VM to imporove its security.

I envisage a Zoom call for about 1hr to discuss and hopefully fix most things.