Build snap for a NestJS Server as a daemon

Hi, I’m trying to generate a build for an app that needs a NodeJS server running in background, that server is build with NestJS

Have this as actual snapcraft.yaml

name: proto-device-server # you probably want to 'snapcraft register <name>'
base: core20 # the base snap is the execution environment for this snap
version: '0.1' # just for humans, typically '1.2+git' or '1.3.2'
summary: Single-line elevator pitch for your amazing snap # 79 char long summary
description: |
  This is my-snap's description. You have a paragraph or two to tell the
  most important story about your snap. Keep it under 100 words though,
  we live in tweetspace and your description wants to look good in the snap

grade: devel # must be 'stable' to release into candidate/stable channels
confinement: devmode # use 'strict' once you have the right plugs and slots

    command: bin/src/server
    daemon: simple
    restart-condition: always


    source: .
    plugin: npm
    npm-node-version: 16.14.0

The problem is that the daemon don’t start correctly, I suspect that the problem resides in the command of the application. Normally the server it’s started with npm start but it didn’t work because of the project structure it’s not copied correctly

Any ideas about that?

Thanks in advanced