The -f test with a wildcard works OK if there is 0 or 1 CSV files but
breaks if there are 2 or more. The replacement uses ls to check if
there are any CSV files.
The start-up logic for TransFAIR is specific to the ECDC/EHDS2 Bridgehead,
and did not belong in the TransFAIR repo. This commit fixes that.
It also honours the change of the TransFAIR branch name for this
project, "ehds2".
This auto-build functionality is a workaround for a bug, described in README.
The README now has additional documentation for EHDS2.
The root certificate files have been expanded to contain certificates for
both the ECDC and the DKFZ setup.