Necessary tweaks

[poikilotherm]

• Make RAM size for Dataverse tunable (certain ops might need more RAM)
• Add bind mount for DV container
• Make Solr and Postgres use ephemeral storage to avoid problems with speed and performance
• Output dataverseAdmin API token via output for reuse
• Make images and their tags selectable (so one can use custom images)
• Make bootstrap persona selectable
• ...