Last minute Pre-MVP optimisations

We identified major optimisations -

1. Replacing plugged-in APM server binary by built-in express service. This could help us handle one less child-service and also reduce App size significantly.
2. Also rewriting frontend part to use system-native runtime to hit APIs instead of using browser-side Fetch library, with the help of Electron IPC methods

As our deadline to launch 2nd MVP was already due, we only implemented pt (1) and added pt (2) in backlog