Bitbucket YLM pipeline to deploy on Digital Ocean

I am following this guide to create a pipeline to deploy my Django project to Digital Ocean, Ubuntu 18 droplet.

What I have done

1. SSH key generated and added to my remote server and bitbucket
2. Synced yml file with project
3. bitbucket-pipelines.yml

image: python:3.7.3

pipelines:
  default:
    - step:
        name: Build and test
        caches:
          - pip
        script: # Modify the commands below to build your repository.
          - pip install -r requirements.txt
          - nosetests test/autotests --with-xunit --xunit-file=nosetests.xml --with-coverage --all-modules
    - step:
        name: Deploy to <myserver>
        script:
          - cat <script>.sh | ssh <user>@<host>
          - echo "Deploy step finished"

ERRORS When I run the pipeline on Bitbucket I get the following ERROR

nosetests test/autotests --with-xunit --xunit-file=nosetests.xml --with-coverage --all-modules
<1s
+ nosetests test/autotests --with-xunit --xunit-file=nosetests.xml --with-coverage --all-modules
bash: nosetests: command not found

Questions

• ssh <user>@<host> I do understand how to replace <user> & <host>
• A.) How I should replace <script> at cat <script>.sh
• B.) How I should replace <myserver> at name: Deploy to <myserver> is this my server's IP address?
• C.) at the bottom section this guide has the following code I do not know what to do whit this?

#!/usr/bin/env bash
echo "Deploy script started"
cd <project git directory>
git pull
sh <restart project>.sh
echo "Deploy script finished execution"