This commit adds an option that runs the migration on a virtual database
that doesn't do anything. This option can be used to see how many rows
there are.
"install: cannot stat 'step-ca_0.23.2/bin/step-ca': No such file or directory"
Upon checking the is no bin directory after step-ca_linux_0.23.2_amd64.tar.gz
is extracted so by simply changing from step-ca_${CA_VERSION:1}/bin/step-ca to step-ca_${CA_VERSION:1}/step-ca the installation succeed.
