Database aufsetzen
- "The official Docker Hub postgres Docker image should be taken for this tier. Use an appropriate version (Hint: POSTGRES_HOST_AUTH_METHOD: trust)."
- "A database for the api tier should be automatically created when the container is started the first time."
- "Postgres should use the default port 5432."
- "Ensure the DB data is persistent."
- "Change the default user and passwords."
- "Use variables in your Docker-Compose files."
- "Do not expose any unnecessary ports to the host."
- "Hand in an explanation why you have chosen your kind of persistence for the DB. What are the other possibilities and compare them (advantages/disadvantages)."