GitLab

Bootstrapping process has been improved on docker compose and and command.sh, so it uses the needed certificates to initialize the list of beacons available inside the registry.

Also, added `testnode` instance to be able to check from within the VLAN

Added curl command to reuse the container for internal tests, and relaxed permissions on generated self-signed certificates

Added Dockerfile definitions in order to build beacon network aggregator and beacon network registry