Sample of configuring GitHub Containers for test databases:

• Always on containers for Postgres, Oracle y SQL Server
• Init script to create each test database and user
• Environment variables to store credentials, with fallback to a properties file
• Test database access from Java

• Define the credentials to access each database:
  • either set the environment variables TEST_POSTGRES_PWD, TEST_ORACLE_PWD and TEST_SQLSERVER_PWD
  • or set their assignments in a file setup/environment.properties as pairs name=value (this file is included in .gitignore to avoid storing credentials in the remote repo)
• Start containers by running the script at setup/container-setup.sh
• Run the tests with mvn test