Github Actions - docker: not found

Trying to install laravel vapor with github actions.

But it returns error while using vapor deploy command.

it returns: sh: docker: not found

Whats wrong with my vapor configurations? I'm sharing my github actions yml file below.

name: Build

on:
  push:
    branches: [master]

jobs:
  build-php:
    name: Build PHP
    runs-on: ubuntu-latest
    container: lorisleiva/laravel-docker:7.4
    steps:
      - uses: actions/checkout@v2
      - run: composer install --prefer-dist --no-ansi --no-interaction --no-progress --no-scripts
      - run: npm ci
      - name: Configure application
        run: |
          cp .env.example .env
          php artisan cache:clear
          php artisan config:clear
          php artisan key:generate

  deploy:
    if: github.ref == 'refs/heads/master'
    name: Deploy application
    runs-on: ubuntu-latest
    container: lorisleiva/laravel-docker:7.4
    needs: [build-php]
    env:
      VAPOR_API_TOKEN: mykey
      VAPOR_ENV: ${{ github.ref == 'refs/heads/master' && 'production' }}
    steps:
      - uses: docker-practice/actions-setup-docker@master
      - run: composer install --no-dev --prefer-dist --no-ansi --no-interaction --no-progress --no-scripts
      - run: vendor/bin/vapor deploy production