Bring back Docker images from Docker Hub

[cuducos]

As suggested in #245, after that PR was merged we'll need to get back to the images from Docker Hub. This is what this PR does ; )

[anaschwendler]

Testing this PR!

1. Clone the repository:

$ git clone [email protected]:datasciencebr/jarbas.git

2. Open the repo folder:

$ cd jarbas

3. Checkout to @cuducos branch:

$ git checkout -b cuducos-docker-images origin/cuducos-docker-images

4. Update the branch:

$ git merge master

5. Copy the .env file:

$ cp contrib/.env.sample env

5. Build and start services:

$ docker-compose up -d

6. Create the database and apply the migrations:

$ docker-compose run --rm django python manage.py migrate
$ docker-compose run --rm django python manage.py searchvector

7. Seeding it with sample data:

$ docker-compose run --rm django python manage.py reimbursements /mnt/data/reimbursements_sample.xz
$ docker-compose run --rm django python manage.py companies /mnt/data/companies_sample.xz
$ docker-compose run --rm django python manage.py suspicions /mnt/data/suspicions_sample.xz
$ docker-compose run --rm django python manage.py tweets

8. Open http://localhost:8000/ and http://localhost:8000/dashboard and do tests with functionalities, works! :)