Better Option for Angular / Node JS / PostgreSQL

I created 2 option for hosting angular/nodejs/postgresql application. The app is a simple POS system that will probably be used by 2-3 persons.

Here is the of the options I made. Check page 2 for the prod environment.

My goal is for me to never be bothered again after I handover the application to the client.

I’m thinking if the standby node for the database is a bit overkill. I’m also thinking if a Kubernetes cluster with 2 nodes is better rather than using 1 droplet.

Please let me know which you think are lacking or overkill.

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