Read database credentials from Environment Variables

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AtypicalSpeech/database.js

Line 3 in e16e1e9

const sequelize = new Sequelize('database_speech', 'database_speech', 'database_speech', {

Even though our database is only locally accessible, it's generally considered far more secure to read credentials from secure storage or at least from the environment. This way, we don't have credentials in the git history. Once this change is adopted, the credentials can be updated.