Update RAM system req in user guide

[ckunki]

According to @ahsimb all models in the demo combined take 6-7 GB.

According to @frschwab could run the translation case with

• AWS instance type t2.xlarge with internal docker DB with
  • 8 GiB RAM
  • 16 GiB disc size

Additionally, the user guide should describe how to connect with db visualizer to the internal docker db,
incl. indicating the ssh command including the port forwarding:

ssh -i .my_key.pem ubuntu@54.93.45.110 -L 49494:localhost:49494 -L 8563:172.17.0.2:8563

[tkilias]

The models take 6 -7 GB on disk; however, they don't run all at the same time, except a user runs multiple notebooks at the same time. But, a model can get large in memory then on disk and this leads to the issue.

[tkilias]

We also need to mention, that the Docker-Db needs more Mem-Size, not only the ec2 instance, vm or host system