How to deploy a NestJs Application on GCP Compute Engine

bitbucket-pipelines.yml

image: atlassian/default-image:3

pipelines:
  branches:
    develop:
      - step:
          name: Deploy to GCP
          caches:
            - docker
          script:
            - pipe: atlassian/ssh-run:0.4.2
              variables:
                SSH_USER: $GCP_SSH_USER
                SERVER: $GCP_SSH_SERVER
                COMMAND: 'sh ~/${BITBUCKET_REPO_SLUG}/deploy.sh ${BITBUCKET_BRANCH}'
                MODE: 'command'
                DEBUG: 'true'

deploy.sh

#!/usr/bin/sh
export PATH="$PATH:$HOME/.nvm/versions/node/v19.9.0/bin"
cd "$HOME/<project-path>" || exit
git fetch --all
git reset --hard origin/$1
git pull origin $1
npm install --silent && npm run build --silent

# Make sure that webserver reloaded after each project change (e.g. pm2)

ecosystem.config.js

module.exports = {
  apps: [
    {
      name: "app",
      script: "npm run start:prod",
      watch: true // Watch the files and restart the app if they change
    }
  ]
};