How to properly deploy a node.js application to ftp using bitbucket pipelines?

Question

Node.js

Hello! To deploy a node.js application, I try to use the following config:

image: node:6.9.4
  branches: # Pipelines that run automatically on a commit to a branch
    master:
     - step:
        caches:
          - node
        script:
          - apt-get update
          - apt-get -qq install git-ftp
          - apt-get install -y ssh
          - git ftp push --user $FTP_LOGIN --passwd $FTP_PASSWORD ftp://$FTP_HOST/public_html/
          - ssh [email protected] ./deploy.sh

In deploy.sh:

#!/usr/bin/env bash
npm install

But it doesn't work. Please tell me the right way