TravisCI deploy image to Dockerhub

dockerhub_deploy.sh

#!/bin/bash
set -o errexit

DOCKER_USERNAME=$1
DOCKER_PASSWORD=$2

DOCKER_TAG_LOCAL=$3
DOCKER_CONTAINER_NAME=$4
VERSION=$5

# login dockerhub
docker login -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD"

# change the local tag name to the target name on dockerhub
docker tag $DOCKER_TAG_LOCAL $DOCKER_USERNAME/$DOCKER_CONTAINER_NAME:$VERSION

# push the container
docker push $DOCKER_USERNAME/$DOCKER_CONTAINER_NAME:$VERSION