fix Documentation

[cjdcordeiro]

• make requirements more clear, including links for Docker* docs
• explain the process of installing mF2C, including the need for the user credentials (@ALEJANDROJ19)
• add remarks about heavy installation and resource consumptions - Limitations section
• document how to verify that the full agent is running successfully (aka healthchecks)
• document the hello world and how to run it
• include a demonstration on how to install mf2c and create/launch the first service
• include the mF2C/mF2C/docker-compose/docs files into a single sections, after sanitizing and cherry picking its content
• create user oriented docs for explaining what mf2c is. Maybe user XLAB's storyboards
  • also include architecture
• create docs from scratch for the microagent deployment

[ALEJANDROJ19]

self-assigned one item:

explain the process of installing mF2C, including the need for the user credentials