Missing docker compose up steps for "Getting Started with Logging (1)"

mhite

Re:

https://trainingportal.linuxfoundation.org/learn/course/getting-started-with-opentelemetry-lfs148/hands-on-lab-manual-instrumentation-logs/hands-on-lab-exercises?page=1

A few things:

• The instructions for changing to the correct directory are wrong. Probably best to bring them in line with the other labs, ie. use of $EXERCISES environment variable, etc.
• The steps for bringing up the supporting containers are missing, ie. the docker compose up steps