fix(vagrant, ci): forward more ports used in docker katas, ci go builder

[xhalo32]

Note: 8000 is required here https://github.com/eficode-academy/docker-katas/blob/master/labs/05-executing.md

The go builder works with the following Jenkinsfile:

pipeline {
  agent {
    label 'build'
  }
  environment {
    GO111MODULE = 'on'
  }
  stages {
    stage('Build') {
      parallel {
        stage('Frontend') {
          steps {
            sh """
                cd frontend
                go build
                """
          }
        }
        stage('Backend') {
          steps {
            sh """
                cd backend
                go build
                """
          }
        }
      }
    }
  }
}