Fix chronolog deployment

[EnekoGonzalez3]

During the creation of ChronoLog's Docker image, many issues have been identified on the deployment of chronolog:

1. build.sh tries to activate spack environment in the incorrect directory.
2. Player deployment present errors with port management and deploying multiple instances.
3. build.sh uses an incorrect parameter for the configuration of the installation folder.
4. Script is able to identify some critical errors, but the management of those is not properly done, as it reports completion of steps with critical errors.
5. help menu should be improved to facilitate the user experience: For example by adding value types.

[fkengun]

The environment variable USER is not set in Docker by default. Better to use something like whoami to get username.