Build and push to dockerhub

Build and push to dockerhub

name: Docker Image CI

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:

  build:

    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v2
    - name: Login to dockerhub
      run: |
        echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
    - name: Build the docker image
      run: docker build . --file Dockerfile --tag cd2team/mailhog:build
    - name: Tag and push
        docker tag cd2team/mailhog:build cd2team/mailhog:latest
        docker tag cd2team/mailhog:latest cd2team/mailhog:$(date +%s)
        docker push cd2team/mailhog:$(date +%s)
        docker push cd2team/mailhog:latest