add .env.database for database and docker for development

[hpbonfim]

I've read the #28 and #40 issues and code about it. Here's the solution:

• Add a .env.database for database environments
• Add a Dockerfile for create a image of the Dolos
• Create a docker-compose.yml to development.
• Add Portainer to manage the containers.
• Add MySQL and phpMyAdmin to manage the local database.
• Add the Dolos inside the container for fast development with mysql.
• Update the README.md and write how to use all those tools.

[hpbonfim]

Ok, I created one for this support #53

[YashKumarVerma]

please resolve merge conflicts.

[lopeselio]

50 merged